[Tachycardia-induced cardiomyopathy]

Area of Science:

• Cardiology
• Electrophysiology

Background:

• Cardiomyopathy encompasses diverse heart muscle diseases impairing cardiac function.
• Tachycardia-induced cardiomyopathy (TIC) results from sustained rapid heart rate, causing heart dilation and systolic dysfunction.
• Clinical presentation of TIC includes heart failure symptoms, but it is reversible upon heart rate normalization.

Purpose of the Study:

• To review the pathophysiology, diagnosis, and treatment of tachycardia-induced cardiomyopathy.
• To highlight the importance of identifying and managing arrhythmias that can lead to reversible heart dysfunction.

Main Methods:

• Literature review of studies on tachycardia-induced cardiomyopathy.
• Analysis of common arrhythmias associated with TIC, including atrial fibrillation, atrial flutter, supraventricular tachycardia, ventricular tachycardia, and ventricular extrasystoles.
• Discussion of diagnostic approaches, often retrospective after heart rate normalization and left ventricular function recovery.

Main Results:

• Sustained tachycardia can lead to significant left ventricular dysfunction and heart failure.
• Atrial fibrillation, atrial flutter, supraventricular tachycardia, ventricular tachycardia, and frequent ventricular extrasystoles are common causes of TIC.
• Diagnosis is typically made after heart rate control and observed recovery of left ventricular function.

Conclusions:

• Tachycardia-induced cardiomyopathy is a potentially reversible cause of heart failure.
• Prompt recognition and management of the underlying arrhythmia are essential for successful treatment and improved cardiac function.
• Despite over a century since its first description, understanding of TIC's precise mechanisms remains limited, necessitating further research.