Genetic Characterization of Patients With Arrhythmia-Induced Cardiomyopathy

Presence of atrial fibrillation or atrial flutter not self-limited.

Performance of a cardiac imaging test with systolic function analysis (echocardiogram, magnetic resonance, CT scan) during the clinical course of the arrhythmia, exhibiting a left ventricular ejection fraction (LVEF) <50%. In order for the test to be representative, the maximum time between the performance of the imaging test and the rhythm control procedure will be 3 months, in the absence of intervening cardiovascular events that may have caused a variation in LVEF. In the event that the patient had a previously known LVEF <50%, the change with respect to this attributable to tachyarrhythmia has to be ≥10%.

Signature of informed consent.

Ability to understand and accept participation in the study.