Related Experiment Video
Updated: Apr 6, 2026

Electrocardiogram Recordings in Anesthetized Mice using Lead II
Published on: June 20, 2020
Prolonged QT: A rare cause of cardiac arrest
1Jennifer Carlquist practices cardiology at Central Coast Cardiology in Salinas, Calif. She teaches nationally for CME4Life. The author has indicated no relationships to disclose relating to the content of this article.
Abstract:
A prolonged QT interval can be caused by medications, electrolyte abnormalities, or long QT syndrome, a genetic mutation that prolongs the action potential. Torsades de pointes is a potentially fatal polymorphic VT most often associated with prolonged QT interval. This article focuses on recognizing and treating drug-induced torsades de pointes.
More Related Videos
Related Concept Videos
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias
Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers
Cardiac Action Potential
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials
Cardiopulmonary Resuscitation IV: Pharmacological Management
Disturbances in Heart Rhythm
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
Dysrhythmias IV: Characteristics of Bradyarrhythmias

