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Related Concept Videos

Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

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Patients with hypertrophic cardiomyopathy (HCM) and left ventricular outflow tract (LVOT) obstruction who remain symptomatic despite optimal medical therapy may undergo a septal myectomy (Morrow procedure). This procedure involves excising a portion of the hypertrophied septum below the aortic valve using a heart-lung machine to improve blood flow through the LVOT. Effective preoperative and postoperative nursing management ensures successful patient outcomes, minimizes complications, and...
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Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
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Dysrhythmias VI: Management of Dysrhythmias

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Updated: May 22, 2026

Cox-Maze IV Procedure Concomitant with Valvular Surgery In Situs Inversus Dextrocardia: A Single-Center Experience in China
08:42

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Multilevel Atrioventricular Block After Cardiac Surgery.

Charlotte De Dobbeleer1, Tim Van Puyvelde2, Bert Vandenberk3

  • 1Department of Cardiology, University Hospitals Leuven, Leuven, Belgium.

JACC. Case Reports
|May 21, 2026
PubMed
Summary
This summary is machine-generated.

Following left atrial myxoma resection and mitral valve repair, a patient developed progressive atrioventricular conduction disturbances. Careful electrocardiographic analysis is crucial for distinguishing multilevel atrioventricular block from complete atrioventricular block.

Keywords:
ECG challengeMobitzWenckebachatrioventricular block

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06:57

Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction

Published on: January 31, 2019

Area of Science:

  • Cardiology
  • Cardiac Surgery
  • Electrophysiology

Background:

  • Left atrial myxomas are primary cardiac tumors.
  • Surgical resection is the standard treatment for cardiac myxomas.
  • Mitral valve repair may be necessary during myxoma resection.

Purpose of the Study:

  • To report a case of progressive atrioventricular conduction disturbances after cardiac surgery.
  • To highlight the diagnostic challenge in differentiating types of atrioventricular block.
  • To emphasize the prognostic and management implications of accurate electrocardiographic interpretation.

Main Methods:

  • Surgical resection of a left atrial myxoma.
  • Concomitant mitral valve repair.
  • Postoperative electrocardiographic monitoring and analysis.

Main Results:

  • The patient exhibited progressive atrioventricular conduction disturbances post-surgery.
  • Conduction abnormalities evolved from Wenckebach periodicity to multilevel atrioventricular block.
  • Accurate electrocardiographic interpretation was key to diagnosis.

Conclusions:

  • Multilevel atrioventricular block requires precise electrocardiographic identification.
  • Misclassification of atrioventricular block can impact patient prognosis and treatment.
  • Detailed ECG analysis is vital in postoperative cardiac patients.