Related Experiment Video

Updated: Nov 4, 2025

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

13.7K

Prominent J wave in cats with hypertrophic cardiomyopathy

Samar H Elsharkawy1, Faisal A Torad1

  • 1Department of Surgery, Anesthesiology and Radiology, Faculty of Veterinary Medicine, Cairo University, Giza Square, P.O. 12211, Cairo, Egypt.

The Journal of Veterinary Medical Science
|May 31, 2021
PubMed

Insights

J waves, previously undocumented in feline hypertrophic cardiomyopathy (HCM), were detected in 63% of HCM cats via electrocardiogram (ECG). These findings suggest J waves are a common ECG marker in cats with HCM.

Area of Science:

  • Veterinary Cardiology
  • Comparative Electrocardiography

Background:

  • J waves are not typically documented in feline hypertrophic cardiomyopathy (HCM) electrocardiograms (ECGs).
  • Understanding ECG abnormalities in HCM is crucial for diagnosis and management in cats.

Purpose of the Study:

  • To describe the presence, morphology, amplitude, and duration of J waves in cats diagnosed with HCM.
  • To investigate the diagnostic significance of J waves in feline HCM.

Main Methods:

  • Electrocardiograms (ECGs) were analyzed from 20 healthy cats and 45 cats with confirmed HCM.
  • J waves were identified based on specific criteria: positive deflection, amplitude ≥0.05 mV, and presence in multiple limb leads over three heart cycles.

Main Results:

  • J waves were absent in healthy cats but detected in 29 out of 45 (63%) cats with HCM.
  • The most common leads for J waves were II and III, with varying amplitudes and durations.
  • Notched and slurred morphologies were observed, with slurred being more prevalent.

Conclusions:

  • J waves are a common finding in the electrocardiograms (ECGs) of cats with hypertrophic cardiomyopathy (HCM).
  • The presence of J waves may serve as a potential ECG biomarker for feline HCM.

Keywords:
J wavecatelectrocardiographyhearthypertrophic cardiomyopathy

More Related Videos

Isolation and Functional Characterization of Human Ventricular Cardiomyocytes from Fresh Surgical Samples14:39

Isolation and Functional Characterization of Human Ventricular Cardiomyocytes from Fresh Surgical Samples

Published on: April 21, 2014

17.6K
Confirmation of Myocardial Ischemia and Reperfusion Injury in Mice Using Surface Pad Electrocardiography09:23

Confirmation of Myocardial Ischemia and Reperfusion Injury in Mice Using Surface Pad Electrocardiography

Published on: November 24, 2016

13.5K

Related Concept Videos

Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

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...
110
Cardiomyopathy II: Dilated Cardiomyopathy01:30

Cardiomyopathy II: Dilated Cardiomyopathy

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,...
111
Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

Cardiomyopathy IV: Restrictive Cardiomyopathy

Restrictive cardiomyopathy (RCM) is a rare heart muscle disease characterized by impaired ventricular filling due to stiffened ventricular walls, leading to significant diastolic dysfunction.EtiologyRestrictive cardiomyopathy can arise from both inherited and acquired diseases, many of which are systemic. It is categorized into four main types: infiltrative, storage, non-infiltrative, and endomyocardial diseases.Infiltrative diseases, such as amyloidosis, lead to RCM by depositing amyloid...
145
Cardiomyopathy I: Introduction and Classification01:25

Cardiomyopathy I: Introduction and Classification

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...
170
Cardiomyopathy VI: Nursing Management01:29

Cardiomyopathy VI: Nursing Management

Assessment: Nursing management of patients with cardiomyopathy begins with a thorough assessment of the patient's history, including a family history of cardiomyopathy or sudden cardiac death, personal history of heart disease, hypertension, diabetes, and any alcohol consumption or drug use.During the physical examination, assess vital signs, look for signs of heart failure (such as edema, jugular venous distention, and cyanosis), auscultate for abnormal heart sounds (like murmurs and gallops),...
109
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias

Arrhythmia is a condition characterized by an irregular heart rhythm, with ECG changes that differ based on its origin and nature. The types of arrhythmias discussed below include atrial, junctional, and ventricular arrhythmias.Atrial ArrhythmiasPremature Atrial Complexes (PACs): PACs are early atrial beats caused by stress, caffeine, alcohol, electrolyte imbalances, hypoxia, hyperthyroidism, or certain medications (e.g., bronchodilators and decongestants). The ECG shows early P waves with an...
228