Key result
Tachycardia, AF, or ~10% PVC burden raises clinical suspicion for arrhythmia-induced cardiomyopathy.
Why the study?
It remains unclear why some patients are more prone to develop arrhythmia-induced cardiomyopathy despite similar arrhythmia burdens, posing a clinical challenge in determining whether arrhythmias are responsible for observed LV dysfunction.
Arrhythmia-induced cardiomyopathy is a reversible condition that should be suspected in patients with LV dysfunction and high arrhythmia burden, where elimination of the arrhythmia can restore LV function.
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Highlights diagnostic challenges in AiCM; leaves open whether arrhythmias fully explain observed LV dysfunction in HF.
Huizar et al. (2019) conducted a review in Arrhythmia-Induced Cardiomyopathy. A mean heart rate >100 beats/min, atrial fibrillation, and/or premature ventricular contractions burden ≥10% should raise suspicion for arrhythmia-induced cardiomyopathy.
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