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Related Concept Videos

Electrocardiogram01:29

Electrocardiogram

6.9K
An electrocardiogram (ECG or EKG) is a critical diagnostic tool that records the electrical signals produced by the heart during each heartbeat. This recording is achieved through electrodes placed strategically on the arms, legs, and chest. The electrocardiograph amplifies these signals and produces 12 distinct tracings, offering a comprehensive understanding of the heart's electrical activity.
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and...
6.9K
Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

1.6K
Introduction
An electrocardiogram (ECG) is a diagnostic tool for identifying cardiac conditions such as arrhythmias, conduction abnormalities, and myocardial ischemia.
Definition
An electrocardiogram (ECG) visualizes the heart's electrical activity by tracing the electrical movement associated with each heartbeat on a graph or monitor. As the heart beats, an electrical wave passes through it, correlating with the cardiac cycle events.
Parts of an ECG
An ECG utilizes electrodes on the skin...
1.6K
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

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

697
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...
697
Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

3.3K
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.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
3.3K
Myocarditis III: Medical Management01:14

Myocarditis III: Medical Management

257
Myocarditis: Comprehensive Medical ManagementMyocarditis, the heart muscle inflammation, requires a comprehensive medical management strategy that addresses the underlying cause, provides supportive care, manages symptoms, and reduces cardiac workload.Infections and Autoimmune CausesAdminister appropriate antimicrobial therapy when an infectious agent causes myocarditis. For instance, penicillin treats infections caused by Group A Streptococcus. In cases where autoimmune processes are...
257
Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

415
Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
415

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Related Experiment Video

Updated: Feb 25, 2026

A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis
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A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis

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ELECTROCARDIOGRAPHIC CHANGES IN VIRAL HEPATITIS.

S K Virmani1

  • 1Classified Specialist (Medicine), Military Hospital Dehradun - 248003.

Medical Journal, Armed Forces India
|August 4, 2017
PubMed
Summary

Electrocardiogram (ECG) abnormalities are common in viral hepatitis, affecting over 70% of patients. These ECG changes are typically transient and do not correlate with illness severity.

Area of Science:

  • Cardiology
  • Hepatology
  • Internal Medicine

Background:

  • Viral hepatitis can affect multiple organ systems, including the cardiovascular system.
  • Electrocardiographic (ECG) changes have been reported in various systemic illnesses.

Purpose of the Study:

  • To investigate the prevalence and nature of electrocardiographic abnormalities in patients diagnosed with viral hepatitis.
  • To determine if ECG findings correlate with the severity or duration of viral hepatitis.

Main Methods:

  • Retrospective analysis of electrocardiograms from 322 patients with diagnosed viral hepatitis.
  • Systematic review of ECG findings, including T wave changes, sinus bradycardia, ST segment changes, ventricular premature beats, and U waves.

Main Results:

Keywords:
ElectrocardiographyHepatitis viral humanMyocarditis

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Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus
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Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus

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Monitoring Changes in Human Umbilical Vein Endothelial Cells upon Viral Infection Using Impedance-Based Real-Time Cell Analysis
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Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus
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Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus

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  • Abnormal ECGs were identified in 229 out of 322 patients (71.1%).
  • The most frequent abnormalities included T wave changes (27%), sinus bradycardia (13.7%), and U waves (6.5%).
  • All observed electrocardiographic abnormalities were transient and showed no correlation with disease severity or duration.

Conclusions:

  • Electrocardiographic abnormalities are highly prevalent in patients with viral hepatitis.
  • These cardiac findings are generally transient and do not serve as indicators of disease severity or prognosis.