1,111 results match your criteria Heart Block Third Degree


A retrospective evaluation of the indications, complications, and outcomes associated with epicardial pacemakers in 20 cats from a single institution.

J Vet Cardiol 2021 May 13;36:89-98. Epub 2021 May 13.

Department of Medical Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, 2015 Linden Dr. Madison, WI 53706, USA.

Introduction: The objective of this retrospective study was to describe the indications, complications, and long-term outcomes in a group of cats that received an epicardial pacing (EP) system.

Animals: Twenty client-owned cats.

Materials And Methods: Medical records were reviewed for signalment, presenting complaint, primary electrocardiogram (ECG) diagnosis, presence of structural heart disease, presence of congestive heart failure (CHF), presence of major or minor complications, and survival time. Read More

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Case Report Detailing an Inferior Myocardial Infarction, Third-Degree Heart Block, and Cardiogenic Shock.

J Emerg Nurs 2021 Jun 9. Epub 2021 Jun 9.

An infarction in the right coronary artery affects the inferior wall of the heart and can also cause impedance to the cardiac conduction system. The right coronary artery perfuses the sinoatrial and atrioventricular nodes, and a loss of blood flow contributes to a breakdown in the communication system within the heart, causing associated bradycardias, heart blocks, and arrhythmias. This case report details the prehospital and emergency care of a middle-aged man who experienced an inferior myocardial infarction, concomitant third-degree heart block, and subsequent cardiogenic shock, with successful revascularization. Read More

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Prevalence and risk factors of atrioventricular block among 15 million Chinese health examination participants in 2018: a nation-wide cross-sectional study.

BMC Cardiovasc Disord 2021 Jun 11;21(1):289. Epub 2021 Jun 11.

Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, 38 Xueyuan Road, Beijing, 100191, China.

Background: Nationwide data on the prevalence of atrioventricular (AV) block are currently unavailable in China. Thus, we aimed to assess the prevalence and risk factors of AV block among Chinese health examination adults.

Methods: A total of 15,181,402 participants aged ≥ 18 years (mean age 41. Read More

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An unusual case report of stress-induced cardiomyopathy presenting as ventricular fibrillation cardiopulmonary arrest and third-degree atrioventricular block.

Eur Heart J Case Rep 2021 May 24;5(5):ytab142. Epub 2021 May 24.

Department of Cardiovascular Medicine, McLaren Macomb Regional Medical Center, 1000 Harrington Street, Mount Clemens, MI 48043, USA.

Background: Takotsubo cardiomyopathy (TCM) can clinically present as an acute coronary syndrome; however, the former has regional wall motion abnormalities that extend beyond a single coronary vascular territory without any plaque rupture. Takotsubo cardiomyopathy classically involves apical ballooning of left ventricle (LV). It is uncommon for TCM to present as cardiopulmonary arrest (CPA) along with third-degree atrioventricular (AV) block. Read More

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Late Arrhythmias in Patients with New-Onset Persistent Left Bundle Branch Block After Transcatheter Aortic Valve Replacement Using a Balloon-Expandable Valve.

Heart Rhythm 2021 May 31. Epub 2021 May 31.

Department of Cardiology, Quebec Heart & Lung Institute, Laval University, Quebec City, Quebec, Canada. Electronic address:

Background: The arrhythmic burden after discharge in patients with new-onset left bundle branch block (LBBB) undergoing transcatheter aortic valve replacement (TAVR) with the balloon-expandable Sapien 3 (S3) valve is unknown.

Objective: To determine the incidence of late arrhythmias in patients with new-onset LBBB undergoing TAVR with the balloon-expandable S3 valve.

Methods: Multicenter, prospective study including 104 consecutive TAVR patients with new-onset persistent LBBB following TAVR with the S3 valve. Read More

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Paroxysmal high-grade second-degree and persistent third-degree atrioventricular block in cats.

J Vet Cardiol 2021 Apr 28;36:20-31. Epub 2021 Apr 28.

Clinical Science and Services, Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Hertfordshire, AL9 7TA, United Kingdom.

Introduction: Both paroxysmal high-grade second-degree and persistent third-degree atrioventricular block (AVB) are recognised in cats. Our aim was to document the presentation, echocardiographic data, comorbidities and outcome in affected cats from a single referral hospital, including those that underwent epicardial pacemaker implantation (EPI).

Animals, Materials And Methods: This retrospective study included 64 cats diagnosed with persistent third-degree or paroxysmal high-grade AVB, for which detailed patient history was available. Read More

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Sex differences in echocardiographic predictors of bradycardia detected by implantable loop recorder in patients with syncope and palpitations.

Echocardiography 2021 May 26. Epub 2021 May 26.

Cardiovascular Non-Invasive Imaging Research Laboratory, Department of Cardiology, Herlev & Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark.

Objective: Our aim was to investigate whether echocardiography may aid in identifying patients, specifically men, at risk of bradycardia as detected by implantable loop recorders (ILR) in patients evaluated for syncope and palpitations.

Methods: We included ambulatory patients undergoing ILR implantation for syncope (84%), presyncope (9%), and palpitations (8%). Echocardiographic examination was performed prior to implantation (2. Read More

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Behavior of AV synchrony pacing mode in a leadless pacemaker during variable AV conduction and arrhythmias.

J Cardiovasc Electrophysiol 2021 Apr 29. Epub 2021 Apr 29.

Department of Cardiology, Kepler University Hospital, Medical Faculty, Johannes Kepler University, Linz, Austria.

Introduction: MARVEL 2 assessed the efficacy of mechanical atrial sensing by a ventricular leadless pacemaker, enabling a VDD pacing mode. The behavior of the enhanced MARVEL 2 algorithm during variable atrio-ventricular conduction (AVC) and/or arrhythmias has not been characterized and is the focus of this study.

Methods: Of the 75 patients enrolled in the MARVEL 2 study, 73 had a rhythm assessment and were included in the analysis. Read More

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Triple Valve Endocarditis With Aortic Root Abscess Presenting With Complete Heart Block and Distal Embolization.

Cureus 2021 Mar 17;13(3):e13942. Epub 2021 Mar 17.

Cardiology, Promedica Health System, Toledo, USA.

Infective endocarditis (IE) carries a high mortality rate. Consequently, the prognosis is poorer in patients with multiple valve involvement. Due to poor prognosis of patients with endocarditis, early diagnosis and management of these patients can be challenging in the clinical setting. Read More

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Clinical symptoms of limited exercise capacity linked to AAI-DDD functionality: An in silico and in vivo approach.

Pacing Clin Electrophysiol 2021 May 21;44(5):943-951. Epub 2021 Apr 21.

Cardiovascular Research Center, Onze-Lieve-Vrouw Hospital Aalst, Moorselbaan 164, Aalst, B-9300, Belgium.

Background: Exercise capacity is an important aspect of quality of life in patients undergoing pacemaker implantation. Device algorithms for ventricular pacing avoidance have been developed to avoid unnecessary and potentially harmful effects of right ventricular pacing. However, little data exists on the immediate response of these algorithms to sudden AV block during exercise. Read More

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A case report of inappropriate inhibition of ventricular pacing due to a unique pacemaker electrogram storage feature.

Eur Heart J Case Rep 2021 Mar 20;5(3):ytab096. Epub 2021 Mar 20.

London Health Sciences Centre, University of Western Ontario, 339 Windermere Road, London, ON N6A 5A5, Canada.

Background: Modern permanent pacemakers (PPMs) have individual features designed to identify cardiac rhythm abnormalities and improve their performance. Inappropriate pacing inhibition may be an undesired outcome from these features and cause symptoms in patients who require frequent pacing, leading to dizziness, and syncope. Inappropriate inhibition can be difficult to identify in circumstances that are intermittent and difficult to reproduce. Read More

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Enhanced detection of cardiac arrhythmias utilizing 14-day continuous ECG patch monitoring.

Int J Cardiol 2021 06 13;332:78-84. Epub 2021 Mar 13.

Heart Rhythm Center, Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan; Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan; Cardiovascular Center, Taichung Veterans General Hospital, Taichung, Taiwan.

Background: To evaluate the performance of a single‑lead, 14-day continuous electrocardiogram (ECG) patch for the detection of arrhythmias compared to conventional 24-h monitoring.

Methods: This prospective clinical trial enrolled patients suspected of arrhythmias but not diagnosed by 12‑lead ECGs. Each patient underwent a 24-h Holter and 14-day ECG patch simultaneously. Read More

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Effects of Intravenous Flunixin Meglumine, Phenylbutazone, and Acupuncture on Ocular Pain Scores in the Horse: A Pilot Study.

J Equine Vet Sci 2021 03 6;98:103375. Epub 2021 Jan 6.

Royal Veterinary College, Anaesthesia and Analgesia Service, London, UK.

In this controlled, blinded, randomized block pilot study, the main objective was to evaluate the effectiveness of intravenous flunixin meglumine, phenylbutazone, and acupuncture on ocular pain relief using a multifactorial pain scale in the horse. Four experimental horses underwent corneal epithelial debridement in four sessions, when a randomly selected treatment or a control was used. All horses were pain scored before corneal wounding, then at 18 time points, when 11 parameters were allocated. Read More

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A Validated Smartphone-based Electrocardiogram Reveals Severe Bradyarrhythmias during Immobilizing Restraint in Mice of Both Sexes and Four Strains.

J Am Assoc Lab Anim Sci 2021 03 26;60(2):201-212. Epub 2021 Feb 26.

Center for Animal Resources and Education, Cornell University, College of Veterinary Medicine, Ithaca, New York.

Mouse handling and restraint affect behavior, physiology, and animal welfare, yet little information is available on how various mouse restraint methods affect cardiovascular parameters. We validated the use of a smartphone-based ECG sys- tem in mice by performing simultaneous smartphone and telemetry ECG recordings in conscious, restrained mice and in anesthetized mice. We observed that mice held in standard immobilizing restraint ("scruffing") experienced severe bradycardia. Read More

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Routine Measurement of Thyroid Stimulating Hormone in Patients Presenting With Third-Degree Atrioventricular Block: Do We Really Need It?

Cureus 2021 Jan 14;13(1):e12712. Epub 2021 Jan 14.

Electrophysiology, National Institute of Cardiovascular Diseases, Karachi, PAK.

Background Hypothyroidism can be a cause of sinus bradycardia. However, thyroid laboratory evaluation is often performed routinely in patients with complete heart block (CHB) though there is little data to support this practice. This study aimed to assess the frequency of thyroid dysfunction in patients presenting with CHB without clinical features of hypothyroidism. Read More

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January 2021

Predictors of in-hospital mortality in patients with end-stage renal disease undergoing transcatheter aortic valve replacement: A nationwide inpatient sample database analysis.

Cardiovasc Revasc Med 2021 Feb 5. Epub 2021 Feb 5.

Section of Cardiology, Department of Medicine, Baylor College of Medicine, Houston, TX, USA. Electronic address:

Background: Patients with end-stage renal disease (ESRD) were excluded from all major trials on the safety of transcatheter aortic valve replacement (TAVR). This study aims to identify the predictors of mortality due to the rising rate of TAVR utilization and subsequent mortality in patients with ESRD.

Methods: The National Inpatient Sample (NIS) (2002-2017) was queried to identify all patients with ESRD undergoing TAVR. Read More

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February 2021

Home fetal heart rate monitoring in anti Ro/SSA positive pregnancies: Literature review and case report.

Eur J Obstet Gynecol Reprod Biol 2021 Apr 28;259:1-6. Epub 2021 Jan 28.

Department of Woman, Mother and Neonate, "V. Buzzi" Children Hospital, ASST Fatebenefratelli Sacco, Milan, Italy; Department of Biomedical and Clinical Sciences "Luigi Sacco", University of Milan, Milan, Italy.

Anti-Ro/SSA antibodies are associated with a risk of 1-2 % to develop complete atrioventricular block (AVB) in fetuses of positive mothers. Complete AVB is irreversible, but studies suggest that anti-inflammatory treatment during the transition period from a normal fetal heart rate (FHR) to an AVB might stop this progression and restore sinus rhythm. The most efficient method for diagnostic evaluation of this arrhythmia is the pulsed-Doppler fetal echocardiography. Read More

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Use and Outcomes of Dual Chamber or Cardiac Resynchronization Therapy Defibrillators Among Older Patients Requiring Ventricular Pacing in the National Cardiovascular Data Registry Implantable Cardioverter Defibrillator Registry.

JAMA Netw Open 2021 01 4;4(1):e2035470. Epub 2021 Jan 4.

Division of Cardiology, University of Colorado Anschutz Medical Campus, Aurora.

Importance: Frequent right ventricular (RV) pacing can cause and exacerbate heart failure. Cardiac resynchronization therapy (CRT) has been shown to be associated with improved outcomes among patients with reduced left ventricular ejection fraction who need frequent RV pacing, but the patterns of use of CRT vs dual chamber (DC) devices and the associated outcomes among these patients in clinical practice is not known.

Objective: To assess outcomes, variability in use of device type, and trends in use of device type over time among patients undergoing implantable cardioverter defibrillator (ICD) implantation who were likely to require frequent RV pacing but who did not have a class I indication for CRT. Read More

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January 2021

High-risk atrioventricular block in Brugada syndrome patients with a history of syncope.

J Cardiovasc Electrophysiol 2021 Mar 19;32(3):772-781. Epub 2021 Jan 19.

Department of Cardiovascular Medicine, Division of Arrhythmia and Electrophysiology, National Cerebral and Cardiovascular Center, Osaka, Japan.

Background: Determining the etiology of syncope is challenging in Brugada syndrome (BrS) patients. Implantable cardioverter defibrillator placement is recommended in BrS patients who are presumed to have arrhythmic syncope. However, arrhythmic syncope in BrS patients can occur in the setting of atrioventricular block (AVB), which should be managed by cardiac pacing. Read More

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Lyme Carditis: A Reversible Cause of Acquired Third-Degree AV Block.

Am J Case Rep 2021 Jan 7;22:e927885. Epub 2021 Jan 7.

Department of Cardiology, NYC Health+Hospitals/Metropolitan, New York City, NY, USA.

BACKGROUND Lyme borreliosis, caused by spirochetes of the Borrelia burgdorferi genospecies complex, is the most commonly reported tickborne infection in North America and those infected may present with cutaneous, cardiac, articular, and neuropsychiatric abnormalities. The protean nature of many of its clinical manifestations presents a diagnostic conundrum. Lyme disease can affect the heart, albeit rarely, with cardiac abnormalities usually manifesting as varying degrees of heart block or arrhythmias. Read More

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January 2021

Capability of emergency nurses for electrocardiogram interpretation.

Int Emerg Nurs 2021 Jan 24;54:100953. Epub 2020 Dec 24.

Advanced Practice Nurse, Department of Accident and Emergency, Queen Elizabeth Hospital, 30 Gascoigne Road, Kowloon, Hong Kong. Electronic address:

Introduction: Electrocardiogram is the first-line diagnostic imaging modality for evaluating patients with chest pain. The present study aimed to determine the capability of emergency nurses for electrocardiogram interpretation by using a more appropriate questioning method.

Methods: This was a cross-sectional descriptive survey. Read More

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January 2021

Lyme Carditis Presenting to a Community Hospital in a Non-Endemic Region.

Cureus 2020 Nov 13;12(11):e11471. Epub 2020 Nov 13.

Emergency Medicine, Overlake Hospital, Bellevue, USA.

Lyme borreliosis is an infectious disease that is increasing in frequency and can cause various forms of carditis in its disseminated phase. In otherwise healthy patients presenting with new-onset atrio-ventricular dissociation, Lyme carditis must be on the differential; however, due to its rarity in non-endemic regions, the clinician must remain vigilant and keep it on the differential. The objective of this clinical case report is to call attention to the importance of rapid diagnosis of Lyme carditis in regions where the disease is not common. Read More

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November 2020

Electrocautery-Induced Complete Heart Block.

J Cardiothorac Vasc Anesth 2021 Jul 10;35(7):2230-2232. Epub 2020 Nov 10.

Department of Anesthesiology, Critical Care, and Pain Medicine, NorthShore University Health System, Evanston, IL.

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Case report: third-degree atrioventricular block secondary to septic coronary artery embolism following infective endocarditis.

Eur Heart J Case Rep 2020 Oct 25;4(5):1-4. Epub 2020 Aug 25.

Department of Cardiology, St George Hospital, Sydney, NSW 2217, Australia.

Background: Coronary artery emboli can occur from a number of rare causes such as arterial thrombo-embolus or septic embolus. This diagnosis generally requires multi-modal imaging including echocardiography, computed tomography, or invasive coronary angiography. Septic coronary emboli is an extremely rare consequence of infective endocarditis (IE), having been reported in <1% of all cases. Read More

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October 2020

Interferons and innate immune activation in autoimmune congenital heart block.

Scand J Immunol 2021 Jan;93(1):e12995

Division of Rheumatology, Department of Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden.

Autoimmune congenital heart block (CHB) may develop in foetuses of women carrying anti-Ro/SSA and La/SSB autoantibodies and is characterized by disruption of signal conduction at the atrioventricular (AV) node, resulting in partial or complete AV block. If not fatal in utero, complete CHB typically requires lifelong cardiac pacing. No treatment has so far been unequivocally demonstrated to prevent or treat autoimmune CHB, and the relatively low incidence (1%-5%) and recurrence (12%-16%) rates of second/third-degree AV block add to the complexity of managing pregnancies in women with anti-Ro/La antibodies. Read More

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January 2021

Elective Inguinal Hernia Surgery in the Setting of Unfollowed Congenital Complete Heart Block With No Postponement.

Cureus 2020 Oct 9;12(10):e10865. Epub 2020 Oct 9.

Anesthesiology, US Anesthesia Partners, Fort Myers, USA.

Most preoperatively discovered complete heart block cases without cardiac clearance in a non-emergent situation are managed with deferral of elective surgery until a cardiology workup can be completed. The medical consequences of surgical delays can manifest in increased costs to the healthcare system via the treatment of more advanced disease, often requiring more intense and more costly treatment in addition to the emotional burden of delay on a patient that has been waiting months for a particular surgery. Delays in surgery have real impacts on patient health outcomes, hospital finances, and patient satisfaction. Read More

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October 2020

Clinical Features, Autoantibodies, and Outcome of Neonatal Lupus Erythematosus.

Authors:
Xiaofeng Yang

Fetal Pediatr Pathol 2020 Oct 24:1-7. Epub 2020 Oct 24.

Department of Neonatology, Children's Hospital of Soochow University, Suzhou, China.

Objectives: To explore the clinical features, autoantibodies, and outcome of neonatal lupus erythematosus (NLE). We retrospectively reviewed all NLE cases from January 2012 to May 2019 that occurred in our department. Cutaneous, cardiac, hematologic, and hepatobiliary manifestations were found in 36. Read More

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October 2020

Case report: high-grade atrioventricular block in suspected COVID-19 myocarditis.

Eur Heart J Case Rep 2020 Oct 25;4(FI1):1-6. Epub 2020 Aug 25.

Department of Cardiology, Glenfield Hospital, Groby Road, Leicester LE3 9QP, UK.

Background: In the ongoing pandemic of COVID-19, respiratory failure has been reported as the main cause of death in those who develop critical illness. A few cases of concurrent myocarditis have been reported, but the extent of cardiac complications with the SARS-CoV-2 strain of coronavirus is still largely unknown.

Case Summary: A 53-year-old man, suspected to have COVID-19 due to a new-onset cough, shortness of breath, and hypoxia, was referred to Cardiology with sudden symptomatic bradycardia. Read More

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October 2020

Asymmetric Occluder Occlusion of Outlet Ventricular Septal Defect Via a Subaxillary Approach.

Ann Thorac Surg 2020 Oct 17. Epub 2020 Oct 17.

Department of Cardiovascular Surgery, Henan Provincial People's Hospital, Fuwai Central Cardiovascular Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, People's Republic of China. Electronic address:

Background: Surgical transpleural minimally invasive occlusion of perimembranous and muscular ventral septal defects provides excellent results, but there is limited experience in outlet ventral septal defects (OVSDs) because of the specific anatomy and because OVSDs may occur with aortic valve prolapse.

Methods: The procedure was performed in 84 children (mean age, 2.5 ± 2. Read More

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October 2020