Related Experiment Video

Updated: Nov 26, 2025

Effects of Surgical Masks on Cardiopulmonary Function in Healthy Subjects
06:57

Effects of Surgical Masks on Cardiopulmonary Function in Healthy Subjects

Published on: February 12, 2021

3.5K

[CME ECC 67: Arrhythmia on Exertion]

Nadine Molitor1, Corinna B Brunckhorst1

  • 1Klinik für Kardiologie, Universitäres Herzzentrum, Universitätsspital Zürich.

Praxis
|December 9, 2020
PubMed

Insights

Ventricular tachycardias are dangerous heart rhythm disorders originating in the ventricles. Understanding their electrocardiogram (ECG) patterns is crucial for diagnosis and treatment.

Area of Science:

  • Cardiology
  • Electrophysiology

Background:

  • Ventricular tachycardias (VT) are life-threatening arrhythmias originating below the His bundle or in the ventricular myocardium.
  • A rapid heart rate (>100 beats/min) characterizes VT.
  • The surface electrocardiogram (ECG) offers vital clues to VT's mechanism and underlying cardiac conditions.

Purpose of the Study:

  • To provide insight into the causes of ventricular tachycardias.
  • To discuss treatment options for ventricular tachycardias.
  • To cover the differential diagnosis of ventricular tachycardias.

Main Methods:

  • Review of current literature on ventricular tachycardias.
  • Analysis of ECG morphology in relation to VT mechanisms.
  • Discussion of diagnostic and therapeutic strategies.

Main Results:

  • ECG morphology is a key determinant in understanding VT mechanisms.
  • Accurate pathomechanism identification is essential for effective management.
  • Various causes and treatment options exist for VT.

Conclusions:

  • Understanding VT requires correlating ECG findings with underlying pathophysiology.
  • Tailored management strategies are crucial for patients with VT.
  • Comprehensive knowledge of VT differential diagnosis aids clinical decision-making.

Keywords:
HerzrhythmusstörungenICDICDPrävention des plötzlichen HerztodsVentricular tachycardiaVentrikuläre Tachykardienheart rhythm disorderprevention of sudden cardiac death

More Related Videos

Cardiac Magnetic Resonance Imaging at 7 Tesla09:14

Cardiac Magnetic Resonance Imaging at 7 Tesla

Published on: January 6, 2019

11.9K
Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus08:28

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

Published on: April 5, 2011

18.0K

Related Concept Videos

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.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
2.0K
Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

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...
207
ECG Interpretation of Arrhythmias I: Sinus Arrhythmias01:16

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

Arrhythmias are disturbances in the heart's rhythm that lead to abnormal heartbeats. These irregularities can originate from different parts of the heart and are classified based on their origin and nature.
Types of Arrhythmias
Sinus Node Arrhythmias
Sinus Bradycardia: Originating from the sinoatrial (SA) node, sinus bradycardia involves slower impulses, resulting in a heart rate of less than 60 beats per minute (bpm). Causes include sleep, vagal stimulation, beta-blockers, hypothyroidism,...
567
Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
1.4K
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...
275
Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

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...
268