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Cardiomyopathy I: Introduction and Classification01:25

Cardiomyopathy I: Introduction and Classification

679
Cardiomyopathy, or CMP, is a group of diseases affecting the myocardial structure, impairing its ability to pump blood effectively. This condition can lead to arrhythmias, heart failure, or sudden cardiac death.Cardiomyopathies are classified into primary and secondary categories:Primary Cardiomyopathy refers to conditions involving only the heart muscle that are often idiopathic (of unknown cause) or genetic. They primarily affect the myocardium without the involvement of other systemic...
679
Cardiomyopathy II: Dilated Cardiomyopathy01:30

Cardiomyopathy II: Dilated Cardiomyopathy

649
Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
649
Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

555
Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
555
Increased pulse rate01:17

Increased pulse rate

1.2K
Tachycardia is a condition marked by an abnormally fast or irregular heart rate, surpassing the typical resting rate. In adults, tachycardia is characterized by a pulse rate ranging from 100 to 180 beats per minute. The increased heart rate can result in inadequate blood flow to various body parts, ultimately diminishing the oxygen supply to organs and tissues.
Many factors can elevate the risk of developing tachycardia. These include advanced age, a family history of arrhythmias, and an...
1.2K
Myocarditis I: Introduction01:21

Myocarditis I: Introduction

478
Myocarditis is inflammation of the myocardium, which is the muscular layer of the heart.EtiologyMyocarditis has a diverse etiology, including a wide range of infectious and non-infectious causes:Infectious CausesViral: Common viruses include Coxsackie A and B, adenovirus, parvovirus B19, enteroviruses, and influenza A.Bacterial: Examples include infections caused by Streptococcus, Staphylococcus, and Mycoplasma species.Rickettsial: Infections like Rocky Mountain spotted fever can result in...
478
Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

571
Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per...
571

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Related Experiment Video

Updated: Feb 25, 2026

Tachycardia-Induced Cardiomyopathy As a Chronic Heart Failure Model in Swine
10:08

Tachycardia-Induced Cardiomyopathy As a Chronic Heart Failure Model in Swine

Published on: February 17, 2018

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Tachycardia-Induced Cardiomyopathy.

Gaetano Barbato1, Valeria Carinci1, Nitish Badhwar2

  • 1Cardiology Division, Cardiology Department, Maggiore Hospital, Largo Nigrisoli 2, Bologna 40133, Italy.

Cardiac Electrophysiology Clinics
|August 4, 2017
PubMed
Summary

This study shows how continuous rapid heartbeats (tachycardia) can harm the heart muscle, causing cardiomyopathy. Successful catheter ablation cured the condition, reversing heart muscle damage and improving symptoms.

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Cardiac Imaging

Background:

  • Tachycardia-induced cardiomyopathy is a serious condition resulting from sustained rapid heart rhythms.
  • Nonreentrant atrioventricular nodal tachycardia can lead to significant ventricular rate increases.
  • Retrograde concealed conduction in the fast pathway is a rare electrophysiological finding.

Purpose of the Study:

  • To illustrate a case of tachycardia-induced cardiomyopathy.
  • To describe the specific mechanism of nonreentrant atrioventricular nodal tachycardia.
  • To highlight the role of catheter ablation in managing this condition.

Main Methods:

  • Case report analysis.
  • Electrophysiological study to identify tachycardia mechanism.
  • Cardiac imaging to assess cardiomyopathy.
  • Catheter ablation procedure.

Main Results:

  • A patient presented with tachycardia-induced cardiomyopathy due to incessant nonreentrant atrioventricular nodal tachycardia.
  • Retrograde concealed conduction in the fast pathway was identified as a key feature.
  • Curative catheter ablation resulted in symptom resolution and reversal of cardiomyopathy.

Conclusions:

  • Incessant tachycardia can cause reversible cardiomyopathy.
  • Catheter ablation is an effective curative treatment for tachycardia-induced cardiomyopathy.
  • Understanding specific electrophysiological findings like retrograde concealed conduction is crucial for successful ablation.