1,244 results match your criteria Annals of Noninvasive Electrocardiology [Journal]


Fragmented QRS and mortality in patients undergoing percutaneous intervention for ST-elevation myocardial infarction: Systematic review and meta-analysis.

Ann Noninvasive Electrocardiol 2018 Jun 22:e12567. Epub 2018 Jun 22.

University of Hawaii Internal Medicine Residency Program, Honolulu, Hawaii.

Background: Fragmented QRS reflects disturbances in the myocardium predisposing the heart to ventricular tachyarrhythmias. Recent studies suggest that fragmented QRS (fQRS) is associated with mortality in ST-elevation myocardial infarction (STEMI) patients who underwent percutaneous coronary intervention (PCI). However, a systematic review and meta-analysis of the literature has not been done. Read More

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Left bundle branch block: Epidemiology, etiology, anatomic features, electrovectorcardiography, and classification proposal.

Ann Noninvasive Electrocardiol 2018 Jun 22:e12572. Epub 2018 Jun 22.

Heart Center, Tampere University Hospital and Faculty of Medicine and Life Sciences, University of Tampere, Finland.

In left bundle branch block (LBBB), the ventricles are activated in a sequential manner with alterations in left ventricular mechanics, perfusion, and workload resulting in cardiac remodeling. Underlying molecular, cellular, and interstitial changes manifest clinically as changes in size, mass, geometry, and function of the heart. Cardiac remodeling is associated with progressive ventricular dysfunction, arrhythmias, and impaired prognosis. Read More

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Questionable validity of left ventricular hypertrophy cutoff values in morbidly and super-morbidly obese patients.

Ann Noninvasive Electrocardiol 2018 Jun 17:e12564. Epub 2018 Jun 17.

Department of Internal Medicine and Cardiology with the Center for Diagnosis and Treatment of Venous Thromboembolism, Medical University of Warsaw, Warsaw, Poland.

Background: Current diagnostic ECG criteria of left ventricular hypertrophy in obese patients are still lacking.

Objective: To assess the current ECG diagnostic criteria of LVH, and to validate our previously proposed criteria in a group of patients with morbid obesity.

Methods: A group of consecutive 429 obese patients (MOP) with BMI of at least 35 kg/m (mean age 38. Read More

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The role of baseline and post-procedural frontal plane QRS-T angles for cardiac risk assessment in patients with acute STEMI.

Ann Noninvasive Electrocardiol 2018 Jun 6:e12558. Epub 2018 Jun 6.

Department of Cardiology, Faculty of Medicine, Dokuz Eylul University, Izmir, Turkey.

Background: To our knowledge, no study so far investigated the importance of post-procedural frontal QRS-T angle f(QRS-T) in ST segment elevation myocardial infarction (STEMI). The aim of our study was to investigate the role of baseline and post-procedural f(QRS-T) angles for determining high risk STEMI patients, and the success of reperfusion.

Methods: A total of 248 patients with first acute STEMI that underwent primary percutaneous coronary intervention (pPCI) or thrombolytic therapy (TT) between 2013 and 2014 were included in this study. Read More

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Ultra-short heart rate variability recording reliability: The effect of controlled paced breathing.

Ann Noninvasive Electrocardiol 2018 Jun 4:e12565. Epub 2018 Jun 4.

Laboratório de Educação Cerebral (LEC), Departamento de Psicologia, Universidade Federal de Santa Catarina, Florianópolis, Brazil.

Background: Recent studies have reported that Heart Rate Variability (HRV) indices remain reliable even during recordings shorter than 5 min, suggesting the ultra-short recording method as a valuable tool for autonomic assessment. However, the minimum time-epoch to obtain a reliable record for all HRV domains (time, frequency, and Poincare geometric measures), as well as the effect of respiratory rate on the reliability of these indices remains unknown.

Methods: Twenty volunteers had their HRV recorded in a seated position during spontaneous and controlled respiratory rhythms. Read More

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Impact of ST-segment resolution on clinical outcome in patients with ST-segment elevation myocardial infarction and preserved left ventricular function.

Ann Noninvasive Electrocardiol 2018 Jun 1:e12562. Epub 2018 Jun 1.

Cardiology Department, Benha Faculty of Medicine, Benha University, Benha, Egypt.

Background: Patients with successful reperfusion and preserved left ventricular ejection fraction (LVEF) after ST-segment myocardial infarction (STEMI)have always been thought to have low risk for adverse events. Great interest is focused on finding simple, noninvasive tools to refine risk stratification among them.

Objectives: We hypothesized that degree of ST-segment resolution (STR) after STEMI can identify high-risk group among patients with LVEF ≥ 50% following STEMI. Read More

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Response to Letter to the Editor: Deep waters of science.

Ann Noninvasive Electrocardiol 2018 Jun 1:e12557. Epub 2018 Jun 1.

Department of Medicine, Kingston General Hospital, Queen's University, Kingston, ON, Canada.

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Seven years follow-up of early repolarisation patterns in French elite special forces.

Ann Noninvasive Electrocardiol 2018 Jun 1:e12560. Epub 2018 Jun 1.

Department of Cardiology, Hôpital d'Instruction des Armées Laveran, Marseille, France.

Background: The early repolarization pattern (ERP) may be a marker of increased risk for sudden cardiac death (SCD). Influence of ethnicity on the ERP has not been extensively studied. The aim of this study was to evaluate the epidemiology of ERP in a male multiethnic population. Read More

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A novel use of cardiac resynchronization therapy-defibrillator device in hypertrophic cardiomyopathy.

Ann Noninvasive Electrocardiol 2018 May 30:e12559. Epub 2018 May 30.

Division of Arrhythmia and Electrophysiology, Department of Cardiology, University of Health Sciences, Yuksek Ihtisas Heart-Education and Research Hospital, Ankara, Turkey.

Dual-chamber implantable cardioverter-defibrillator is generally used in patients with atrioventricular block and hypertrophic cardiomyopathy with preserved left ventricular ejection fraction. In the current case, a cardiac resynchronization therapy-defibrillator device was implanted in a patient with non-obstructive hypertrophic cardiomyopathy with preserved ejection fraction and atrioventricular block to achieve both more physiological pacing and life-threatening ventricular arrhythmia management. Read More

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Predictive value of the baseline electrocardiogram ST-segment pattern in cardiogenic shock: Results from the CardShock Study.

Ann Noninvasive Electrocardiol 2018 May 30:e12561. Epub 2018 May 30.

Cardiology, Heart and Lung Center, Helsinki University Hospital, University of Helsinki, Helsinki, Finland.

Background: The most common aetiology of cardiogenic shock (CS) is acute coronary syndrome (ACS), but even up to 20%-50% of CS is caused by other disorders. ST-segment deviations in the electrocardiogram (ECG) have been investigated in patients with ACS-related CS, but not in those with other CS aetiologies. We set out to explore the prevalence of different ST-segment patterns and their associations with the CS aetiology, clinical findings and 90-day mortality. Read More

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May 2018
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Comparison of four LBBB definitions for predicting mortality in patients receiving cardiac resynchronization therapy.

Ann Noninvasive Electrocardiol 2018 May 28:e12563. Epub 2018 May 28.

First Department of Cardiology, Interventional Electrocardiology and Hypertension, Medical College, Jagiellonian University, Cracow, Poland.

Background: Left bundle branch block (LBBB) is considered an important prognostic parameter in cardiac resynchronization therapy (CRT). We aimed to evaluate, in a sizeable cohort of patients with CRT, long-term mortality, and morbidity according to four different electrocardiographic definitions of LBBB.

Methods: This longitudinal cohort study included consecutive patients who underwent CRT device implantation in our institution in years 2006-2014. Read More

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Arthur J. Moss (1931-2018).

Authors:
Wojciech Zareba

Ann Noninvasive Electrocardiol 2018 May 17;23(3):e12556. Epub 2018 May 17.

Annals of Noninvasive Electrocardiology, Rochester, New York.

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Chest-lead ST-J amplitudes using arm electrodes as reference instead of the Wilson central terminal in smartphone ECG applications: Influence on ST-elevation myocardial infarction criteria fulfillment.

Ann Noninvasive Electrocardiol 2018 May 7:e12549. Epub 2018 May 7.

Department of Clinical Sciences Lund, Clinical Physiology, Skane University Hospital, Lund University, Lund, Sweden.

Background: "Smartphone 12-lead ECG" for the assessment of acute myocardial ischemia has recently been introduced. In the smartphone 12-lead ECG either the right or the left arm can be used as reference for the chest electrodes instead of the Wilson central terminal. These leads are labeled "CR leads" or "CL leads. Read More

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Genotype-phenotype relationship and risk stratification in loss-of-function SCN5A mutation carriers.

Ann Noninvasive Electrocardiol 2018 Apr 30:e12548. Epub 2018 Apr 30.

Department of Cardiovascular Diseases, University Hospitals Leuven, Leuven, Belgium.

Introduction: Loss-of-function (LoF) mutations in the SCN5A gene cause multiple phenotypes including Brugada Syndrome (BrS) and a diffuse cardiac conduction defect. Markers of increased risk for sudden cardiac death (SCD) in LoF SCN5A mutation carriers are ill defined. We hypothesized that late potentials and fragmented QRS would be more prevalent in SCN5A mutation carriers compared to SCN5A-negative BrS patients and evaluated risk markers for SCD in SCN5A mutation carriers. Read More

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Pacing spikes following QRS complexes: What is the mechanism?

Ann Noninvasive Electrocardiol 2018 Apr 25:e12545. Epub 2018 Apr 25.

Department of Electrocardiology, The John Paul II Hospital, Kraków, Poland.

The electrocardiogram (ECG) interpretation in patients with implantable cardioverter defibrillator (ICD) is often a puzzling problem. The difficulty of the device function evaluation further increases in the presence of unfamiliar timing cycles and additional functions. Authors present a special function of a Biotronik ICD devices called the thoracic impedance monitoring, and demonstrate its behavior in a patient with sinus rhythm, ventricular ectopic beats, and ventricular tachycardia episode. Read More

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Use of fragmented QRS in prognosticating clinical deterioration and mortality in pulmonary embolism: A meta-analysis.

Ann Noninvasive Electrocardiol 2018 Apr 19:e12552. Epub 2018 Apr 19.

Department of Medicine, Kingston General Hospital, Queen's University, Kingston, Ontario, Canada.

Background: Fragmented QRS (fQRS) on electrocardiography is potentially valuable in prognosticating acute pulmonary embolism (PE). ECG is one of the first tests performed in the emergency department, quickly interpretable, noninvasive, inexpensive, and available in remote areas. We aimed to review fQRS's role in PE prognostication. Read More

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April 2018
1 Read

Prognostic value of positive T wave in lead aVR in patients with non-ST segment myocardial infarction.

Ann Noninvasive Electrocardiol 2018 Apr 19:e12554. Epub 2018 Apr 19.

University at Buffalo, Buffalo, New York.

Background: Lead aVR provides prognostic information in various settings in patients with ischemia. We aim to investigate the role of a positive T wave in lead aVR in non-ST segment myocardial infarction (NSTEMI).

Methods: In a prospective cohort study, we included 400 patients with NSTEMI. Read More

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April 2018
1 Read

Transient left anterior and septal fascicular blocks after self-expandable percutaneous transcatheter aortic valve implantation.

Ann Noninvasive Electrocardiol 2018 Apr 19:e12553. Epub 2018 Apr 19.

Heart Center, Tampere University Hospital and Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland.

Transcatheter aortic valve implantation (TAVI) is indicated in severe symptomatic aortic stenosis, when there is intermediate-high surgical risk, or a condition considered inoperable, as in the case of "porcelain aorta" that could turn clamping or cannulation of the ascending aorta hazardous in open-heart surgery. Among the complications of this less invasive procedure, intraventricular conduction disorders subsequent to the procedure stand out. TAVI causes worsening of intraventricular dromotropic disorders in more than 75% of the cases, with the presence of preexisting right bundle branch block and first-degree atrioventricular block, deep prosthesis implant, male gender, size of the aortic annulus smaller than the prosthesis, and porcelain aorta being predictive of requirement for permanent pacemaker implant. Read More

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April 2018
1 Read

The nightmare ECG of a spontaneously aborted sudden cardiac death.

Ann Noninvasive Electrocardiol 2018 Apr 19:e12547. Epub 2018 Apr 19.

Cardiology Division, Casa di Cura Villa Verde, Taranto, Italy.

We present the case of a spontaneously aborted sudden cardiac death related to an high-rate ventricular tachycardia in an healthy man with bileaflet mitral valve prolapse. An effective treatment of the patient, with complete suppression of ventricular ectopic activity, was achieved only combining medical therapy, ICD and catheter ablation, thus overcoming the limitations of each approach. Read More

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April 2018
1 Read

Electro-vectorcardiographic demonstration of bifascicular block associated with ventricular preexcitation.

Ann Noninvasive Electrocardiol 2018 Apr 19:e12550. Epub 2018 Apr 19.

Heart Center, Tampere University Hospital and Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland.

Down syndrome occurs more frequently in the offsprings of older pregnant women and may be associated with atrioventricular septal defect. This refers to a broad spectrum of malformations characterized by a deficiency of the atrioventricular septum and abnormalities of the atrioventricular valves caused by an abnormal fusion of the superior and inferior endocardial cushions with the midportion of the atrial septum and the muscular portion of the ventricular septum. Read More

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April 2018
3 Reads

Shallow meta analysis.

Authors:
Marek Malik

Ann Noninvasive Electrocardiol 2018 Apr 19:e12543. Epub 2018 Apr 19.

National Heart and Lung Institute, Imperial College, London, England, UK.

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April 2018
1 Read

Transient left septal fascicular block and left anterior fascicular block as a consequence of proximal subocclusion of the left anterior descending coronary artery.

Ann Noninvasive Electrocardiol 2018 Apr 19:e12546. Epub 2018 Apr 19.

Heart Center, Tampere University Hospital, Tampere, Finland.

The association of left anterior fascicular block (LAFB) with left septal fascicular block (LSFB) characterizes a left bifascicular block subtype rarely described in the literature, probably due to the fact that most researchers are not aware of the existence of the left septal fascicle. We describe a case with this transient intraventricular dromotropic disturbance due to left anterior descending coronary artery subocclusion. Read More

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April 2018
3 Reads

Arrhythmic manifestation of peripartum cardiomyopathy-Case report.

Ann Noninvasive Electrocardiol 2018 Apr 17:e12551. Epub 2018 Apr 17.

Department of Cardiology, Bieganski Hospital, Medical University of Lodz, Lodz, Poland.

We report a case of 26-year-old woman, with arrhythmic manifestation of peripartum cardiomyopathy with moderate heart failure. Ventricular arrhythmia recorded in ambulatory Holter ECG (premature ventricular contractions) was most severe during pregnancy, reduced when beta-blocker therapy was initiated and almost completely resolved after delivery. Then, 1 year after hospitalization in Cardiology Department, recurrence was observed with recorded short episode of nonsustained ventricular tachycardia. Read More

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April 2018
1 Read

Stress cardiomyopathy: Provoked chaotic T-wave lability.

Ann Noninvasive Electrocardiol 2018 Apr 17:e12544. Epub 2018 Apr 17.

Cardiology Department, Mount-Sinai St. Luke's Hospital, New York, NY, USA.

Potentially lethal arrhythmia, occurring at presentation or during hospitalization, are a part of the clinical spectrum of stress cardiomyopathy. There is significant association between the catecholamine provoked nonalternating beat to beat fluctuations in T-wave morphology, termed T-wave lability (TWL), and the clinical risk of arrhythmia. We report four patients with diagnosis of stress cardiomyopathy, in whom serial electrocardiography showed macrovoltage nonalternating fluctuations in T-wave morphology. Read More

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April 2018
1 Read
1.44 Impact Factor

Corrigendum.

Authors:

Ann Noninvasive Electrocardiol 2018 Mar;23(2):e12542

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March 2018
1 Read

Fine versus coarse atrial fibrillation in rheumatic mitral stenosis: The impact of aging and the clinical significance.

Ann Noninvasive Electrocardiol 2018 Mar 5. Epub 2018 Mar 5.

Department of Anesthesiology, University at Buffalo, Buffalo, NY, USA.

Background: Atrial fibrillation (AF) as the most rhythm disturbance in patients with rheumatic mitral stenosis (MS), is classified in to coarse and fine subtypes according to the height of fibrillatory wave amplitude. The aim of this study is to identify the factors associated with the presence of fine versus coarse morphology in patients with rheumatic MS.

Methods: In this cross-sectional study, patients with confirmed diagnosis of severe rheumatic MS admitted between March 2013 and March 2017 were screened. Read More

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March 2018
1 Read

Clinical aspects of the three major genetic forms of long QT syndrome (LQT1, LQT2, LQT3).

Ann Noninvasive Electrocardiol 2018 May 5;23(3):e12537. Epub 2018 Mar 5.

Heart Research Follow-up Program in the Cardiology Unit, University of Rochester Medical Center, Rochester, NY, USA.

Background: A comprehensive report on the clinical course of the three major genotypes of the long QT syndrome (LQTS) in a large U.S. patient cohort is lacking. Read More

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May 2018
2 Reads

Bizarre and scary ECG in yew leaves poisoning: Report of successful treatment.

Ann Noninvasive Electrocardiol 2018 Feb 28. Epub 2018 Feb 28.

Emergency Department, Ospedale San Lazzaro, Alba, CN, Italy.

Yew leaves poisoning is a rare life-threatening intoxication, whose diagnosis can be difficult. Initial symptoms are nausea, vomiting, abdominal pain, dizziness, tachycardia, muscle weakness, confusion, beginning within 1 hr from ingestion and followed by bradycardia, ventricular arrhythmias, ventricular fibrillation, severe hypotension, and death. Taxine-derived alkaloids are responsible for the toxicity of the yew leaves, blocking sodium and calcium channels, and causing conduction abnormalities. Read More

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February 2018
3 Reads

Prognostic value of T-wave morphology parameters in coronary artery disease in current treatment era.

Ann Noninvasive Electrocardiol 2018 Feb 27. Epub 2018 Feb 27.

Research Unit of Internal Medicine, Medical Research Center Oulu, University of Oulu and Oulu University Hospital, Oulu, Finland.

Background: The prognostic value of T-wave morphology parameters in coronary artery disease in the current treatment era is not well established.

Methods: The Innovation to reduce Cardiovascular Complications of Diabetes at the Intersection (ARTEMIS) study included 1,946 patients with angiographically verified coronary artery disease (CAD). The study patients underwent thorough examinations including 12-lead digital electrocardiogram (ECG) at baseline. Read More

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February 2018
1 Read

Transient left septal fascicular block in the setting of acute coronary syndrome associated with giant slurring variant J-wave.

Ann Noninvasive Electrocardiol 2018 Feb 24. Epub 2018 Feb 24.

Heart Center, Tampere University Hospital and Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland.

We report a case of acute coronary syndrome with transient prominent anterior QRS forces (PAF) caused by proximal subocclusion of the left anterior descending (LAD) coronary artery before the first septal perforator branch. The ECG change indicates left septal fascicular block (LSFB) with associated slurring-type giant J-wave. Currently, this J-wave variant is considered as a lambda-like wave or QRS-ST-T "triangulation". Read More

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February 2018
2 Reads

Diagnostic value of the cardiac electrical biomarker, a novel ECG marker indicating myocardial injury, in patients with symptoms suggestive of non-ST-elevation myocardial infarction.

Ann Noninvasive Electrocardiol 2018 Feb 24. Epub 2018 Feb 24.

Department of Cardiology and Cardiovascular Research Institute Basel (CRIB), University Hospital Basel, University of Basel, Basel, Switzerland.

Background: The cardiac electrical biomarker (CEB) is a novel electrocardiographic (ECG) marker quantifying the dipolar activity of the heart with higher levels indicating myocardial injury.

Methods: We prospectively enrolled 1097 patients presenting with suspected non-ST-elevation myocardial infarction (NSTEMI) to the emergency department (ED). Digital 12-lead ECGs were recorded at presentation and the CEB values were calculated in a blinded fashion. Read More

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February 2018
3 Reads

Symptomatic arrhythmia in the form of multiple premature ventricular extrasystoles as the first symptom of polymyositis.

Ann Noninvasive Electrocardiol 2018 Jan 30:e12532. Epub 2018 Jan 30.

Department of Cardiology, Pomeranian Medical University, Szczecin, Poland.

Polymyositis (PM) is an autoimmune disease characterized by the involvement of multiple internal organs, including the cardiovascular system. The involvement of heart is observed in up to 75% of patients with PM. Conduction and rhythm disorders are one of the most common cardiological abnormalities in these patients. Read More

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January 2018
2 Reads

J. Thomas Bigger Jr. MD, 1935-2017.

Ann Noninvasive Electrocardiol 2018 Mar 30;23(2):e12530. Epub 2018 Jan 30.

University of Rochester School of Medicine & Dentistry, Rochester, NY, USA.

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March 2018
1 Read

Baseline fragmented QRS increases the risk of major arrhythmic events in hypertrophic cardiomyopathy: Systematic review and meta-analysis.

Ann Noninvasive Electrocardiol 2018 Jan 24. Epub 2018 Jan 24.

Department of Internal Medicine, Michigan Medicine, University of Michigan, Ann Arbor, MI, USA.

Background: Fragmented QRS reflects disturbances in the myocardium predisposing the heart to ventricular tachyarrhythmias. Recent studies suggest that fragmented QRS (fQRS) is associated with worse major arrhythmic events in hypertrophic cardiomyopathy (HCM). However, a systematic review and meta-analysis of the literature has not been done. Read More

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January 2018
4 Reads

The analysis of the parameters of 24-hr ECG Holter monitoring in patients with blood neoplasms undergoing high-dose chemotherapy and stem cell transplantation.

Ann Noninvasive Electrocardiol 2018 Jan 24. Epub 2018 Jan 24.

Department of Internal Medicine, Occupational Diseases and Hypertension, Wroclaw Medical University, Wroclaw, Poland.

Background: Hematopoietic stem cell transplantation (HSCT) is a widely used procedure in the treatment of malignant diseases, including blood neoplasms and has increased survival in hematological diseases. The aim of the study was to analyze parameters of 24-hr ECG monitoring in patients with selected blood neoplasms in whom the procedure of hematopoietic stem cell transplantation was performed.

Methods: The study group consisted of 64 adults diagnosed with hematologic cancer qualified for HSCT with the previous high dose chemotherapy (HDC). Read More

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January 2018
6 Reads

Acute coronary syndrome of very unusual etiology.

Ann Noninvasive Electrocardiol 2018 Jan 21. Epub 2018 Jan 21.

Faculty of Medicine and Life Sciences, Heart Center, Tampere University Hospital, University of Tampere, Tampere, Finland.

Aortitis is one of many possible manifestations of tertiary syphilis. Aortic disease is the most common of all cardiovascular syphilitic lesions. Aortic diseases caused by tertiary syphilis include aortitis, aortic root dilation, aneurysm formation, aortic regurgitation and coronary ostial stenosis. Read More

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January 2018
4 Reads

Response of the authors to the letter: Differentiation of wide QRS tachycardia: Garbage in, garbage out.

Authors:
Vivek Reddy

Ann Noninvasive Electrocardiol 2018 01;23(1)

Wayne State University School of Medicine/Detroit Medical Center, Detroit, MI.

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January 2018
1 Read

Coarse fibrillatory waves in atrial fibrillation predict success of electrical cardioversion.

Ann Noninvasive Electrocardiol 2017 Dec 22. Epub 2017 Dec 22.

Department of Cardiology, Bedford Hospital, Bedford, UK.

Background: To determine whether the presence of "coarse" fibrillatory waves (Fw) seen on surface ECGs of patients with persistent atrial fibrillation (AF) predict maintenance of sinus rhythm (SR) at 6 weeks after electrical cardioversion (ECV).

Methods: Preprocedure ECGs from 94 consecutive patients with persistent AF scheduled to undergo ECV at a single centre were classified as having coarse Fw (≥0.1 mV) or fine Fw (<0. Read More

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December 2017
10 Reads

Comparison of the predictive accuracy of four different ECG algorithms in identification of true ablation site for the idiopathic right ventricular outflow tract tachycardias.

Ann Noninvasive Electrocardiol 2018 May 22;23(3):e12529. Epub 2017 Dec 22.

Turkiye Yuksek Ihtisas Research and Education Hospital, Ankara, Turkey.

Background: We aimed to investigate the accuracy of four algorithms in prediction of right ventricular outflow tract (RVOT) tachycardias in patients who successfully underwent radiofrequency catheter ablation.

Methods: Four algorithms; two with easy-applicability and having a memorable design (Dixit and Joshi), and two with more complex and detailed design (Ito and Zhang) were compared according to the predictive accuracy.

Results: Among 99 patients (mean age 36. Read More

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May 2018
6 Reads

Noninvasive phase mapping of persistent atrial fibrillation in humans: Comparison with invasive catheter mapping.

Ann Noninvasive Electrocardiol 2017 Dec 22. Epub 2017 Dec 22.

Asklepios Klinik St. Georg, Hamburg, Germany.

Background: A novel noninvasive epicardial and endocardial electrophysiology system (NEEES) to identify electrical rotors and focal activity in patients with atrial fibrillation (AF) was recently introduced. Comparison of NEEES data with results from invasive mapping is lacking.

Methods: Six male patients (59 ± 11 years) with persistent AF underwent cardiac mapping with the NEEES, which included the creation of isopotential and phase maps. Read More

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December 2017
11 Reads

Unshielded magnetocardiography: Repeatability and reproducibility of automatically estimated ventricular repolarization parameters in 204 healthy subjects.

Ann Noninvasive Electrocardiol 2018 May 20;23(3):e12526. Epub 2017 Dec 20.

Biomagnetism and Clinical Physiology International Center, Catholic University of Sacred Heart, Rome, Italy.

Background: Magnetocardiographic mapping (MCG) provides quantitative assessment of the magnetic field (MF) induced by cardiac ionic currents, is more sensitive to tangential currents, and measures vortex currents undetectable by ECG, with higher reported sensitivity of MCG ventricular repolarization (VR) parameters for earlier detection of acute myocardial ischemia. Aims of this study were to validate the feasibility of in-hospital unshielded MCG and to assess repeatability and reproducibility of quantitative VR parameters, considering also possible gender- and age-related variability.

Methods: MCG of 204 healthy subjects [114 males-mean age 43. Read More

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May 2018
5 Reads

Relation between electrical and mechanical dyssynchrony in patients with left bundle branch block: An electro- and vectorcardiographic study.

Ann Noninvasive Electrocardiol 2017 Dec 18. Epub 2017 Dec 18.

Ghent University Hospital, Heart Center, Ghent, Belgium.

Background: Current guidelines select patients for cardiac resynchronization therapy (CRT) mainly on electrocardiographic parameters like QRS duration and left bundle branch block (LBBB). However, among those LBBB patients, heterogeneity in mechanical dyssynchrony occurs and might be a reason for nonresponse to CRT. This study assesses the relation between electrocardiographic characteristics and presence of mechanical dyssynchrony among LBBB patients. Read More

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December 2017
4 Reads

S-R difference in V1-V2 is a novel criterion for differentiating the left from right ventricular outflow tract arrhythmias.

Ann Noninvasive Electrocardiol 2018 May 10;23(3):e12516. Epub 2017 Dec 10.

Department of Cardiology, Adana Numune Training and Research Hospital, Health Sciences University, Adana, Turkey.

Aim: The correct estimation of the VA origin as RVOT or LVOT results in reduced ablation duration reduced radiation exposure and decreased number of vascular access. In our study, we aimed to detect the predictive value of S-R difference in V1-V2 for differentiating the left from right ventricular outflow tract arrhythmias.

Methods: We included 123 patients with symptomatic frequent premature ventricular outflow tract contractions who underwent successful catheter ablation (70 male, 53 female; mean age 46. Read More

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May 2018
5 Reads

Heart rate recovery fast-to-slow phase transition: Influence of physical fitness and exercise intensity.

Ann Noninvasive Electrocardiol 2018 May 8;23(3):e12521. Epub 2017 Dec 8.

Faculty of Medicine, University of São Paulo, São Paulo, Brazil.

Background: Postexercise heart rate (HR) recovery presents an exponential decay, with two distinct phases: a fast phase, characterized by abrupt decay of HR, and determined by parasympathetic reactivation; and a slow phase, characterized by gradual decay of HR, and predominantly determined by sympathetic withdrawal. Although several methods have been proposed to assess postexercise HR recovery, none of those methods selectively assesses the time of transition from the fast to the slow phase of the HR recovery curve (HRR ), and the magnitude of decay prior to (HRR ) and after this point (HRR ). Therefore, the aim of the present study was to propose a method to identify HRR , HRR , and HRR and to verify the effects of exercise intensity and physical fitness on such parameters. Read More

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May 2018
2 Reads

Repetitive-incessant electrical storm triggered by early repolarization.

Ann Noninvasive Electrocardiol 2017 Dec 5. Epub 2017 Dec 5.

Metropolitan Hospital, Athens, Greece.

Early repolarization syndrome (ERS) was originally considered a normal variant with benign outcome. However, recent studies have demonstrated that it can be linked to a considerable risk of life-threatening arrhythmias and sudden cardiac death. We report a case with an extraordinary, extremely malignant clinical expression of ERS refractory to all antiarrhythmic drugs including quinidine. Read More

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December 2017
4 Reads

Is myocardial repolarization duration associated with repolarization heterogeneity?

Ann Noninvasive Electrocardiol 2018 May 2;23(3):e12519. Epub 2017 Dec 2.

General Electric Healthcare, Milwaukee, WI, USA.

Background: Dispersion of repolarization is theorized as one mechanism by which myocardial repolarization prolongation causes lethal torsades de pointes, (TdP). Our primary purpose was to determine whether prolongation of myocardial repolarization as measured by the heart rate-corrected J-to-T peak interval (JTpkc), is associated with repolarization heterogeneity as measured by transmural dispersion, defined as the median duration from the peak to the end of the T wave (TpTe).

Methods: A retrospective cohort study was performed at a single urban tertiary ED from July 2011-September 2012. Read More

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May 2018
3 Reads

Late-onset severe long QT syndrome.

Ann Noninvasive Electrocardiol 2017 Nov 30. Epub 2017 Nov 30.

University Clinic of Cardiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.

We report a case of torsades de pointes arrhythmia as the first manifestation of congenital Long QT syndrome in a 77-year-old man with family history of sudden unexplained death. This case illustrates the importance of vigilant clinical assessment and genetic counseling in families with sudden death in order to identify properly asymptomatic relatives at risk for cardiac events. It also demonstrates that Long QT syndrome can still manifest with potentially fatal arrhythmias late in life in previously asymptomatic elderly patients. Read More

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November 2017
5 Reads

Narrowing filtered QRS duration on signal-averaged electrocardiogram predicts outcomes in cardiac resynchronization therapy patients with nonischemic heart failure.

Ann Noninvasive Electrocardiol 2018 May 30;23(3):e12523. Epub 2017 Nov 30.

Department of Cardiology, Tokyo Women's Medical University, Tokyo, Japan.

Background: To evaluate the impact of changes in the filtered QRS duration (fQRS) on signal-averaged electrocardiograms (SAECGs) from pre- to postimplantation on the clinical outcomes in nonischemic heart failure (HF) patients under cardiac resynchronization therapy (CRT).

Methods: We studied 103 patients with nonischemic HF and sinus rhythm who underwent CRT implantation. SAECGs were obtained within 1 week before and 1 week after implantation and narrowing fQRS was defined as a decrease in fQRS from pre- to postimplantation. Read More

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May 2018
2 Reads

A case report: Is mexiletine usage effective in the shortening of QTC interval and improving the T-wave alternans in Timothy syndrome?

Ann Noninvasive Electrocardiol 2018 May 30;23(3):e12522. Epub 2017 Nov 30.

Department of Pediatric Cardiology, Istanbul Mehmet Akif Ersoy Thoracic and Cardiovascular Surgery Education and Research Hospital, Istanbul Saglik Bilimleri University, Istanbul, Turkey.

Timothy syndrome (TS) is a multisystemic disease that occurs because of a mutation in CACN1C gene and is characterized by prolonged QT interval. Mexiletine is a Class 1B antiarrhythmic drug that causes the disappearance of T-wave alternans by shortening QTc and peak-to-end of the T wave. It may block the development of torsades de pointes in a prolonged QT. Read More

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May 2018
3 Reads

Loperamide cardiotoxicity: "A Brief Review".

Ann Noninvasive Electrocardiol 2018 Mar 10;23(2):e12505. Epub 2017 Nov 10.

Department of Electrophysiology, Staten Island University Hospital, Staten Island, NY, USA.

Loperamide is a popular antidiarrheal medication that has been used for many years. It is currently gaining more attention among healthcare professionals due to its increasing potential for side effects. At present, it is considered safe enough to be sold over the counter. Read More

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March 2018
4 Reads