Arrhythmia-Induced Cardiomyopathy.

Area of Science:

• Cardiology
• Electrophysiology
• Heart Failure Research

Background:

• Heart failure impacts 1-2% of the population, contributing to significant morbidity and mortality.
• Cardiac arrhythmias can precipitate left-ventricular systolic dysfunction (LVSD), a condition known as arrhythmia-induced cardiomyopathy (AIC).
• Physicians must consider the causal link between arrhythmias and systolic heart failure in patient management.

Purpose of the Study:

• To review the diagnosis, pathophysiology, and treatment of arrhythmia-induced cardiomyopathy (AIC).
• To highlight the underappreciated role of atrial fibrillation in unexplained LVSD.
• To emphasize the potential reversibility of AIC with timely intervention.

Main Methods:

• Selective literature search of PubMed (1987–2017).
• Review of current clinical guidelines.
• Synthesis of evidence on the relationship between arrhythmias and LVSD.

Main Results:

• AIC diagnosis requires persistent arrhythmia and unexplained LVSD.
• Tachyarrhythmias and frequent ventricular extrasystoles can cause progressive LVSD.
• Atrial fibrillation is a common, often underappreciated, cause of AIC in adults.
• Treatment involves managing the underlying arrhythmia (e.g., beta-blockers, amiodarone, catheter ablation).
• LVSD improvement or normalization post-arrhythmia treatment confirms AIC diagnosis.

Conclusions:

• Arrhythmia-induced cardiomyopathy is a potentially reversible cause of LVSD.
• Early recognition and effective treatment of the causative arrhythmia are crucial for improving patient outcomes.
• Targeted arrhythmia management can lead to substantial recovery of left-ventricular function.