26,073 results match your criteria normal ecg

[Reversible left ventricular hypertrophy and congestive heart failure due to suspected myocarditis in a cat in the course of FLUTD].

Sonja Sinzinger

Tierarztl Prax Ausg K Kleintiere Heimtiere 2021 Jun 22;49(3):220-227. Epub 2021 Jun 22.

Tierklinik Stuttgart Plieningen GbR.

A 2.5-year-old castrated male domestic shorthair cat with a past pertinent history of FLUTD treatment 8 days earlier was presented during the night due to apathy and anorexia. Radiographs, ECG, blood pressure measurement and echocardiography revealed left-sided congestive heart failure, left ventricular concentric hypertrophy, left atrial dilation, severe diastolic dysfunction, hypotension, and vagotonus-associated sinus bradycardia with a first degree AV-block as well as a right bundle brunch block. Read More

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Recognition of pre-hypertrophic cardiac involvement in Fabry Disease based on automated electrocardiographic measures.

Int J Cardiol 2021 Jun 19. Epub 2021 Jun 19.

Institute of Health and Wellbeing, University of Glasgow, Scotland, United Kingdom.

Background: Various electrocardiographic (ECG) indices have been shown to be useful for early recognition and staging of cardiac involvement in Fabry Disease (FD). However, many of them lack acceptable sensitivity and specificity. We assessed the value of automated ECG measures to discriminate between pre-hypertrophic FD and healthy individuals. Read More

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Diabetes mellitus aggravates ranolazine-induced ECG changes in rats.

J Interv Card Electrophysiol 2021 Jun 21. Epub 2021 Jun 21.

Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.

Purpose: Diabetes mellitus (DM) is known to affect the pharmacokinetics of drugs. In this study, we evaluated the effect of DM on the liver content of CYP 3A2 enzyme. We also explored the ECG changes after administration of ranolazine in non-DM and DM rats. Read More

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Deep convolutional neural networks based ECG beats classification to diagnose cardiovascular conditions.

Biomed Eng Lett 2021 May 16;11(2):147-162. Epub 2021 Feb 16.

Healthy Ageing Theme, Garvan Institute of Medical Research, Darlinghurst, NSW 2010 Australia.

Medical practitioners need to understand the critical features of ECG beats to diagnose and identify cardiovascular conditions accurately. This would be greatly facilitated by identifying the significant features of frequency components in temporal ECG wave-forms using computational methods. In this study, we have proposed a novel ECG beat classifier based on a customized VGG16-based Convolution Neural Network (CNN) that uses the time-frequency representation of temporal ECG, and a method to identify the contribution of interpretable ECG frequencies when classifying based on the SHapley Additive exPlanations (SHAP) values. Read More

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ULECGNet: An Ultra-Lightweight End-to-End ECG Classification Neural Network.

IEEE J Biomed Health Inform 2021 Jun 18;PP. Epub 2021 Jun 18.

ECG classification is a key technology in intelligent ECG monitoring. In the past, traditional machine learning methods such as SVM and KNN have been used for ECG classification, but with limited classification accuracy. Recently, the end-to-end neural network has been used for the ECG classification and shows high classification accuracy. Read More

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AF episodes recognition using optimized time-frequency features and cost-sensitive SVM.

Phys Eng Sci Med 2021 Jun 17. Epub 2021 Jun 17.

Institut IRIMAS, Université de Haute Alsace, 68093, Mulhouse, France.

Although atrial fibrillation (AF) Arrhythmia is highly prevalent within a wide range of populations with major associated risks and due to its episodic occurrence, its recognition remains a challenge for doctors. This paper aims to present and experimentally validate a new efficient approach for the detection and classification of this cardiac anomaly using multiple Electrocardiogram (ECG) signals. This work consists of applying Stockwell transform (ST) with compact support kernel (ST-CSK) for ECG time-frequency analysis. Read More

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Brugada Pattern Phenocopy Induced by Diabetic Ketoacidosis.

Cureus 2021 May 16;13(5):e15066. Epub 2021 May 16.

Interventional Cardiology, Unity Health, Searcy, USA.

Brugada syndrome is a congenital cardiac channelopathy characterized by ST-segment elevation (≥2 mm) and subsequent inverted T wave in a minimum of two right precordial leads (Brugada type 1 ECG [electrocardiogram] pattern) on ECG. Brugada syndrome is estimated to be responsible for 4%-12% of all sudden cardiac deaths and up to 20% in patients with structurally normal hearts. Development of a temporary Brugada pattern, known as Brugada phenocopy, has been observed in individuals presenting with reversible underlying conditions such as hyperkalemia, hyponatremia, acidosis, ischemia, and pulmonary embolism, among others. Read More

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Cardiac injury in organophosphate poisoning after acute ingestion.

Toxicol Res (Camb) 2021 May 26;10(3):446-452. Epub 2021 Apr 26.

Department of Cardiology, Postgraduate Institute of Medical Education and Research, 3rd Floor, Block - C, Advanced Cardiac Center, PGIMER, Chandigarh 160012, India.

Introduction: Sparse data and conflicting evidence exist on the prevalence and prognosis of organophosphate (OP)-related cardiac toxicity. We aimed to characterize the cardiac abnormalities of OP after an acute cholinergic crisis in adults without previous cardiovascular conditions.

Patients And Methods: We did a prospective observational study in a tertiary-care hospital of north India (Postgraduate Institute of Medical Education and Research, Chandigarh) in 74 patients aged ≥ 13 years admitted with acute OP poisoning after self-ingestion. Read More

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A new deep learning algorithm of 12-lead electrocardiogram for identifying atrial fibrillation during sinus rhythm.

Sci Rep 2021 Jun 17;11(1):12818. Epub 2021 Jun 17.

Division of Cardiology, Department of Internal Medicine, Inha University College of Medicine and Inha University Hospital, 27 Inhang-ro, Jung-gu, Incheon, 22332, Republic of Korea.

Atrial fibrillation (AF) is the most prevalent arrhythmia and is associated with increased morbidity and mortality. Its early detection is challenging because of the low detection yield of conventional methods. We aimed to develop a deep learning-based algorithm to identify AF during normal sinus rhythm (NSR) using 12-lead electrocardiogram (ECG) findings. Read More

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Incidence of electrocardiographic alterations in the preoperative period of non-cardiac surgery.

Rev Esp Anestesiol Reanim (Engl Ed) 2021 May 11;68(5):252-257. Epub 2021 May 11.

Servicio de Cardiología, Unidad Coronaria, Servicio de Cardiología, Hospital Universitario La Princesa, Madrid, Spain.

Background: The electrocardiogram is the most widely used test to assess cardiovascular risk during the preoperative period. The objective of the present study is to evaluate the incidence of electrocardiographic alterations in the general population scheduled for non-cardiac surgery and to determine if the age greater than or equal to 65 years or the revised cardiac risk index ≥1 represent a risk factor for presenting these alterations.

Material And Methods: Over a period of one month, all preoperative electrocardiograms (ECG) from the anesthesia clinic were analyzed. Read More

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Association Between Postoperative Long-Term Heart Rate Variability and Postoperative Delirium in Elderly Patients Undergoing Orthopedic Surgery: A Prospective Cohort Study.

Front Aging Neurosci 2021 31;13:646253. Epub 2021 May 31.

Department of Anesthesiology, Zhujiang Hospital, Southern Medical University, Guangzhou, China.

Background: Postoperative delirium (POD) is a common complication after orthopedic surgery in elderly patients. The elderly may experience drastic changes in autonomic nervous system (ANS) activity and circadian rhythm disorders after surgery. Therefore, we intend to explore the relationship between postoperative long-term heart rate (HR) variability (HRV), as a measure of ANS activity and circadian rhythm, and occurrence of POD in elderly patients. Read More

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The significance of upright T wave in lead V1 in predicting myocardial ischemia A literature review.

J Electrocardiol 2021 Jun 1;67:103-106. Epub 2021 Jun 1.

Heart Hospital, Hamad Medical Corporation, Doha, Qatar.

Chest pain is still representing one of the most common and serious presentations to the emergency department worldwide. ECG is a crucial tool in evaluating patients with chest pain; however, only around 50% of patients with acute coronary syndrome (ACS) will have a diagnostic ECG upon their presentation; the rest may either have a completely normal ECG or what is called nonspecific ST segment and T wave (NSSTTW) changes, hence it is essential to recognize the subtle ECG changes and know its significance. One of the ECG changes that can be easily missed is when the T wave in V1 is upright, especially when it is either a Tall Upright T wave (TTV1) or a New Tall Upright T-wave (NTTV1). Read More

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[Clinical value of left ventricular strain analysis by cardiovascular magnetic resonance in patients with coronary chronic total occlusion].

Zhonghua Xin Xue Guan Bing Za Zhi 2021 Jun;49(6):601-609

Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029,China.

To explore the clinical value of quantitatively assessment of left ventricular strain in patients with coronary chronic total occlusion (CTO) by cardiac magnetic resonance imaging (CMR)-feature tracking (CMR-FT) technique. In this retrospective and observation study, patients with single CTO, who underwent CMR examination in Beijing Anzhen Hospital from November 2014 to January 2019, were selected as case group (CTO group), and those without cardiovascular diseases defined by echocardiography, electrocardiogram (ECG) and clinical history and with normal CMR results were selected as healthy control group (control group). General clinical data including age, gender, discharge diagnosis, and the examination results of echocardiography and ECG were obtained from the electronic medical record system. Read More

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Left anterior descending/right coronary artery bifurcation angioplasty in a rare case of single coronary artery: a case report.

Eur Heart J Case Rep 2021 Apr 21;5(4):ytab047. Epub 2021 Apr 21.

Professor of Medicine & Interventional Cardiologist, Department of Cardiology, Military Hospital, Jaipur-302016, India.

Background: Single coronary artery (SCA) is a rare congenital coronary anomaly with incidence of 8-66 per 100 000 cases. Percutaneous coronary intervention (PCI) in patients with SCA is technically challenging. This is a case of bifurcation angioplasty involving left anterior descending/right coronary artery (LAD/RCA) in a patient with SCA and 1-year follow-up with computed tomography coronary angiography (CTCA). Read More

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The Association Between Heart Rate Variability and 90-Day Prognosis in Patients With Transient Ischemic Attack and Minor Stroke.

Front Neurol 2021 28;12:636474. Epub 2021 May 28.

Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.

Low heart rate variability (HRV) is known to be associated with increased all-cause, cardiovascular, and cerebrovascular mortality but its association with clinical outcomes in patients with transient ischemic attack (TIA) or minor stroke is unclear. We selected TIA and minor stroke patients from a prospective registration study. From each continuous electrocardiograph (ECG) record, each QRS complex was detected and normal-to-normal (N-N) intervals were determined. Read More

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Dominant-Negative Effect of an Brugada Syndrome Variant.

Front Physiol 2021 28;12:661413. Epub 2021 May 28.

INSERM, UMR_S 1166 ICAN, Paris, France.

Loss-of-function mutations in the cardiac Na channel α-subunit Na1.5, encoded by , cause Brugada syndrome (BrS), a hereditary disease characterized by sudden cardiac death due to ventricular fibrillation. We previously evidenced the dominant-negative effect of the BrS Na1. Read More

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Unusual Bilateral Upper Extremity Pitting Edema in a Patient With Severe Dermatomyositis.

Cureus 2021 Jun 4;13(6):e15445. Epub 2021 Jun 4.

Rheumatology, Adventist Medical Center, Hanford, USA.

A 56-year-old Hispanic female presented with six weeks of progressive dysphagia, proximal muscle weakness, erythematous rash, bilateral upper extremity pitting edema, and left lower extremity pitting edema. She had preserved heart function and a normal echocardiogram (ECG). She presented with elevated creatine kinase (CK) and aldolase, with normal renal function. Read More

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Echocardiographic parameters in 50 healthy English bulldogs: preliminary reference intervals.

J Vet Cardiol 2021 May 12;36:55-63. Epub 2021 May 12.

Anicura Istituto Veterinario Novara, Strada Provinciale 9, Granozzo con Monticello, Novara, 28060, Italy.

Introduction/objectives: The objective of the study was to provide echocardiographic reference intervals for English bulldogs (EBs) and to assess if age, sex, body weight (BW), and heart rate have an influence on echocardiographic variables.

Animals: We prospectively enrolled client-owned EBs that were considered healthy based on unremarkable history, normal physical examination, six-lead electrocardiography, and transthoracic echocardiography.

Materials And Methods: Breed-related reference intervals were provided, and associations between age, sex, BW, and heart rate and echocardiographic variables were tested using a multivariate analysis. Read More

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Distinguishing atrial fibrillation from sinus rhythm using commercial pulse detection systems: The non-interventional BAYathlon study.

Digit Health 2021 Jan-Dec;7:20552076211019620. Epub 2021 May 22.

Cardio Centrum Düsseldorf, Düsseldorf, Germany.

Objective: Early diagnosis of atrial fibrillation (AFib) is a priority for stroke prevention. We sought to test four commercial pulse detection systems (CPDSs) for ability to distinguish AFib from normal sinus rhythm using a published algorithm (Zhou et al., PLoS One 2015;10:e0136544), compared with visual diagnosis by electrocardiogram inspection. Read More

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A randomised, controlled trial to determine the effect of levothyroxine on Standardbred racehorses.

Equine Vet J 2021 Jun 8. Epub 2021 Jun 8.

Department of Veterinary Clinical Sciences, Purdue University College of Veterinary Medicine, West Lafayette, Indiana, 47907, USA.

Background: The use of thyroid supplement is pervasive in athletic horses although its effects on measures of performance are not known.

Objectives: One purpose of this study was to determine whether supra-physiologic doses of levothyroxine affect the velocities at which blood lactate was greater than 4 mmol/L (V ) and heart rate was over 150 (V ) and 200 (V ) beats per minute respectively. Additionally, a survey of post-race blood samples was also conducted to determine whether high thyroxine concentrations were common in racehorses. Read More

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Electrocardiogram in Pediatric Syncope: Practice Variation Among Pediatric Emergency Physicians.

Pediatr Emerg Care 2021 Jun 7. Epub 2021 Jun 7.

From the Division of Emergency Medicine Children's Heart Centre, Department of Pediatrics, BC Children's Hospital, University of British Columbia, Vancouver, BC, Canada.

Objectives: We intended to assess emergency department physician's practice pattern and their motivations for obtaining electrocardiograms (ECGs) in pediatric vasovagal syncope presentations. We also explored if borderline ECG findings alters emergency department physicians' management in this population.

Methods: We conducted a cross-sectional survey of emergency physicians enrolled in the Pediatric Emergency Research Canada network. Read More

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Development and external validation of prognostic models to predict sudden and pump-failure death in patients with HFrEF from PARADIGM-HF and ATMOSPHERE.

Clin Res Cardiol 2021 Jun 8. Epub 2021 Jun 8.

British Heart Foundation Cardiovascular Research Centre, University of Glasgow, 126 University Place, Glasgow, G12 8TA, UK.

Background: Sudden death (SD) and pump failure death (PFD) are the two leading causes of death in patients with heart failure and reduced ejection fraction (HFrEF).

Objective: Identifying patients at higher risk for mode-specific death would allow better targeting of individual patients for relevant device and other therapies.

Methods: We developed models in 7156 patients with HFrEF from the Prospective comparison of ARNI with ACEI to Determine Impact on Global Mortality and morbidity in Heart Failure (PARADIGM-HF) trial, using Fine-Gray regressions counting other deaths as competing risks. Read More

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Analysis of the shape of the T-wave in congenital long-QT syndrome type 3 by geometric morphometrics.

Sci Rep 2021 Jun 7;11(1):11909. Epub 2021 Jun 7.

Department of Pediatric Cardiology, Saitama Medical University International Medical Center, Hidaka, Japan.

The characteristic shape of the T-wave in congenital long-QT syndrome type 3 (LQTS3) is considered a late-onset T-wave. We analyzed the difference in the shapes of the T-waves of V5 in the electrocardiograms (ECGs) of LQTS3 cases and normal subjects using generalized Procrustes analysis. The J and Q points of LQTS3 cases are shifted to the upper left compared to those of normal subjects. Read More

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Meeting the unmet needs of clinicians from AI systems showcased for cardiology with deep-learning-based ECG analysis.

Proc Natl Acad Sci U S A 2021 Jun;118(24)

Biomedical Engineering, Technion - Israel Institute of Technology, Haifa, 3200003, Israel

Despite their great promise, artificial intelligence (AI) systems have yet to become ubiquitous in the daily practice of medicine largely due to several crucial unmet needs of healthcare practitioners. These include lack of explanations in clinically meaningful terms, handling the presence of unknown medical conditions, and transparency regarding the system's limitations, both in terms of statistical performance as well as recognizing situations for which the system's predictions are irrelevant. We articulate these unmet clinical needs as machine-learning (ML) problems and systematically address them with cutting-edge ML techniques. Read More

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Left ventricular noncompaction-a rare cause of triad: heart failure, ventricular arrhythmias, and systemic embolic events: a case report.

J Med Case Rep 2021 Jun 8;15(1):316. Epub 2021 Jun 8.

Faculty of Medicine- Physiology Department, The University of Medicine and Pharmacy Craiova, Craiova, Romania.

Background: Left ventricular noncompaction is a rare cardiomyopathy characterized by a thin, compacted epicardial layer and a noncompacted endocardial layer, with trabeculations and recesses that communicate with the left ventricular cavity. In the advanced stage of the disease, the classical triad of heart failure, ventricular arrhythmia, and systemic embolization is common. Segments involved are the apex and mid inferior and lateral walls. Read More

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[Dyspnea and palpitations in a 39-year-old male patient].

Internist (Berl) 2021 Jun 7. Epub 2021 Jun 7.

Klinik für Innere Medizin - Kardiologie, Angiologie, Nephrologie und konservative Intensivmedizin, Vivantes Klinikum Neukölln, Rudower Str. 48, 12351, Berlin, Deutschland.

A 39-year-old male patient presented with dyspnea and palpitations. The electrocardiogram (ECG) showed a first degree atrioventricular (AV) block and frequent atrial extra systoles. Within the following 48 h the AV block gradually developed into a third degree intermittent complete AV block. Read More

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Association of Heart Rate Variability With Silent Brain Infarcts in Patients With Atrial Fibrillation.

Front Cardiovasc Med 2021 21;8:684461. Epub 2021 May 21.

Department of Cardiology, University Hospital Basel, Basel, Switzerland.

Silent brain infarcts (SBI) are frequently detected in patients with atrial fibrillation (AF), but it is unknown whether SBI are linked to autonomic dysfunction. We aimed to explore the association of autonomic dysfunction with SBI in AF patients. 1,358 AF patients without prior stroke or TIA underwent brain MRI and 5-min resting ECG. Read More

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High voltage electrical injuries: outcomes & 1-year follow-up from a level 1 trauma centre.

Int J Burns Trauma 2021 15;11(2):115-122. Epub 2021 Apr 15.

Assistant Professor Trauma Surgery, Trauma Centre, AIIMS Rishikesh India.

Background: High voltage (>1000 V) electric injuries (HVEI) are rare, and dreaded due to profound myonecrosis and fatal arrhythmias. Trauma Centres are well equipped for acute and definitive treatment of injuries. Paucity of burn centres in Himalayan belt make trauma centres a prudent choice for management of HVEIs. Read More

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COVID-19: persistence of symptoms and lung alterations after 3-6 months from hospital discharge.

Infection 2021 Jun 6. Epub 2021 Jun 6.

Internal Medicine, San Giovanni di Dio Hospital, Via di Torregalli 3, 50143, Florence, Italy.

Purpose: Few data are currently available on persistent symptoms and late organ damage in patients who have suffered from COVID-19. This prospective study aimed to evaluate the results of a follow-up program for patients discharged from a nonintensive COVID-19 ward.

Methods: 3-6 months after hospital discharge, 59 of 105 COVID-19 patients (31 males, aged 68. Read More

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Estimation of PQ distance dispersion for atrial fibrillation detection.

Comput Methods Programs Biomed 2021 May 18;208:106167. Epub 2021 May 18.

Faculty of health sciences, Universidad Simón Bolívar Carrera 54 # 64 - 222, Barranquilla,1086, Colombia, USA.

Background And Objective: Atrial fibrillation (AF) is the most common cardiac arrhythmia in the world. It is associated with significantly increased morbidity and mortality. Diagnosis of the disease can be based on the analysis of the electrical atrial activity, on quantification of the heart rate irregularity or on a mixture of the both approaches. Read More

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