Related Experiment Video
Updated: Apr 16, 2026
08:43
Advanced Cardiac Rhythm Management by Applying Optogenetic Multi-Site Photostimulation in Murine Hearts
Published on: August 26, 2021
3.0K
Optimal antiarrhythmic drug therapy for electrical storm
Dan Sorajja1, Thomas M Munger1, Win-Kuang Shen1
1Division of Cardiovascular Diseases, Mayo Clinic Arizona, Phoenix, AZ 85054, USA.
Journal of Biomedical Research
|March 7, 2015
Summary
Electrical storm, characterized by frequent ventricular arrhythmias, poses significant health risks. Antiarrhythmic medications are crucial adjunctive treatments alongside devices for managing these dangerous heart rhythm episodes.
Area of Science:
- Cardiology
- Electrophysiology
- Internal Medicine
Background:
- Electrical storm involves frequent ventricular arrhythmias like ventricular tachycardia or fibrillation.
- It is associated with considerable morbidity and mortality.
- Causes include ischemic heart disease, structural heart disease, and genetic conditions.
Purpose of the Study:
- To highlight the significance of electrical storm.
- To discuss management strategies for electrical storm.
- To emphasize the role of antiarrhythmic medication.
Main Methods:
- Review of existing literature on electrical storm.
- Analysis of conditions associated with electrical storm.
- Discussion of treatment modalities including medications and devices.
Main Results:
- Electrical storm is defined as 3 or more episodes of ventricular tachycardia or fibrillation within 24 hours.
- It is linked to various cardiac conditions.
- Implantable cardioverter defibrillators and ablation are key treatments.
Conclusions:
- Electrical storm is a serious condition with high risks.
- Antiarrhythmic medications are vital as adjunctive therapy.
- Integrated treatment approaches are necessary for managing patients.
Related Concept Videos
01:12Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers
3.0K
Class III antiarrhythmic drugs are a group of medications that can prolong action potentials in the heart. They achieve this by blocking potassium channels or enhancing inward currents from sodium channels. However, these drugs have a unique property of "reverse use-dependence," which is most pronounced at slower heart rates and can lead to torsades de pointes—a specific type of arrhythmia. However, it is essential to note that excessive QT interval prolongation—a measure of...
3.0K
01:22Antiarrhythmic Drugs: Class I Agents as Sodium Channel Blockers
4.3K
Class I antiarrhythmic drugs are used to treat various types of arrhythmias or irregular heart rhythms. These drugs block the sodium (Na+) channels in the cardiac cells, thereby affecting the movement of electrical impulses across the heart. Class I antiarrhythmic drugs are divided into three subgroups: Class IA, Class IB, and Class IC, each with distinct mechanisms of action and effects on the heart.
Class 1A Antiarrhythmic Drugs: These drugs work by moderately blocking sodium channels,...
Class 1A Antiarrhythmic Drugs: These drugs work by moderately blocking sodium channels,...
4.3K
01:24Antiarrhythmic Drugs: Class II Agents as β-Adrenergic Blockers
2.4K
Adrenergic stimulation generally impacts cardiac rate and rhythm. Specifically, stimulation of the β-adrenoceptors triggers an increase in intracellular calcium ion influx and pacemaker currents, which may cause arrhythmias. Catecholamines like adrenaline also demonstrate β2-adrenoceptor-mediated hypokalemia, impacting cardiac action potential and disrupting the normal cardiac rhythm. Class II antiarrhythmic drugs are β-adrenoceptor antagonists or β-blockers, which...
2.4K
01:25Dysrhythmias VI: Management of Dysrhythmias
637
Dysrhythmia management involves a multifaceted approach, incorporating pharmacological treatments, medical procedures, surgical interventions, lifestyle modifications, and patient education.Pharmacological ManagementAntiarrhythmic Drugs:Class I (Sodium Channel Blockers): This class includes quinidine and procainamide, which reduce the speed of impulse conduction in the heart, stabilize the cardiac membrane, and control arrhythmias. Quinidine and procainamide are Class IA agents that prolong the...
637
01:25ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias
1.1K
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...
1.1K
01:20Antiarrhythmic Drugs: Class IV Agents as Calcium Channel Blockers
2.7K
Class IV antiarrhythmic drugs, such as verapamil and diltiazem, block calcium channels. They primarily affect the heart, slowing the conduction in calcium-dependent tissues like the SA and AV nodes. These drugs manage reentrant supraventricular tachycardia (SVT) and reduce ventricular rate in atrial flutter/fibrillation.
Verapamil, a calcium channel blocker, inhibits calcium movement across myocardial cell membranes and vascular smooth muscle. This results in the dilation of coronary and...
Verapamil, a calcium channel blocker, inhibits calcium movement across myocardial cell membranes and vascular smooth muscle. This results in the dilation of coronary and...
2.7K