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Related Concept Videos

Chambers of the Heart01:16

Chambers of the Heart

The human heart is a complex organ made up of four chambers: the right and left atria and the right and left ventricles. These internal chambers are separated by partitions known as the interatrial and interventricular septa. The exterior of the heart features a groove known as the coronary sulcus that demarcates the atria from the ventricles, while the anterior and posterior interventricular sulci distinguish between the two ventricles.
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Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

Bradyarrhythmias are cardiac rhythm disorders characterized by a slower-than-normal heart rate, typically defined as fewer than 60 beats per minute. Some of which are discussed here:Sinus BradycardiaSinus bradycardia presents a heart rate lower than 60 beats per minute, with a regular rhythm originating from the SA node. The ECG typically shows normal P waves preceding each QRS complex, a normal PR interval (0.12 to 0.20 seconds), and a normal QRS duration (0.06 to 0.10 seconds).First-Degree AV...
Overview of the Heart01:07

Overview of the Heart

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Heart Valves01:16

Heart Valves

The human heart is a complex organ with an intricate system of valves that regulate blood flow. There are two main types of valves: atrioventricular (AV) valves and semilunar valves.
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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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Aortic Regurgitation I: Introduction01:15

Aortic Regurgitation I: Introduction

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Transthoracic Echocardiography to Assess Post-Resuscitation Left Ventricular Dysfunction After Acute Myocardial Infarction and Cardiac Arrest in Pigs
08:19

Transthoracic Echocardiography to Assess Post-Resuscitation Left Ventricular Dysfunction After Acute Myocardial Infarction and Cardiac Arrest in Pigs

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Reverse BBRVT in a structurally normal heart.

Thomas Phlips1, Hemant Ramchurn, Luc De Roy

  • 1Cardiology Service, Electrophysiology Unit, University Hospital Mont-Godinne (UCL), Yvoir, Belgium. thomasphlips@telenet.be

Acta Cardiologica
|December 21, 2012
PubMed
Summary
This summary is machine-generated.

This study details a rare case of reverse bundle-branch reentry ventricular tachycardia (BBRVT) in a patient with pre-existing right bundle-branch block. Diagnosis can be challenging due to similar QRS morphology during tachycardia and sinus rhythm.

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Cardiac Arrhythmias

Background:

  • Bundle-branch reentry ventricular tachycardia (BBRVT) is a recognized arrhythmia.
  • Reverse BBRVT (R-BBRVT) presents with a right bundle-branch block (RBBB) morphology during tachycardia.
  • Diagnosis can be complicated by similar QRS morphology in sinus rhythm versus tachycardia.

Observation:

  • A case of R-BBRVT was observed in a patient with a preexisting right bundle-branch block.
  • The patient had no apparent structural heart disease.
  • The wide QRS morphology during tachycardia mimicked supraventricular rhythms.

Findings:

  • R-BBRVT should be suspected in patients with extensive His-Purkinje conduction system disease.
  • The presence of pre-existing right bundle-branch block can mask or complicate the diagnosis of R-BBRVT.
  • Diagnostic challenges arise from the similarity in QRS morphology between sinus rhythm and tachycardia.

Implications:

  • Increased clinical suspicion for R-BBRVT is warranted in specific patient populations.
  • Understanding the diagnostic nuances is crucial for appropriate management.
  • Further research into the etiology and treatment of R-BBRVT in non-structural heart disease is needed.