Characterization of Arrhythmia-induced Cardiomyopathy

The goal of the this observational study is to gather clinically available data on patients presenting with a suspicion for arrhythmia-induced cardiomyopathy (AiCM) at the University Hospital Basel.

Prospective partInclusion Criteria:Diagnostic or suspicion of AiCM as presence of specified keyword in patient's file or as screened by colleagues of the internal medicine or cardiology clinicsSigned study consentExclusion Criteria:Patient's active refusal of the general consent of the University Hospital BaselAge <18 years oldTemporary exclusion criteria: Acute health condition such as myocardial infarction, patients presenting with a major trauma, a sepsis, patients shortly after cardiac surgery, and patients in shock (>100 bpm, <90 systolic BP, evidence of organ dysfunction).Life expectancy <1 year (palliative, terminal cancer)Retrospective partInclusion Criteria:Patients with a reduced left-ventricular ejection fraction (LVEF ≤50%) or a reduction of 15% in the ejection fraction (EF) between two echocardiographies and a concomitant diagnosis of any arrhythmia likely to lead to AiCM within one year before or after diagnosis of the reduced LVEF from 2010-2021Exclusion Criteria:Age < 18 years oldPatient's active refusal of the general consent of the University Hospital BaselAcute event clearly leading to an acutely reduced LVEF (massive type I myocardial infarction, cardiogenic shock from a coronary or myocardial etiology, septic shock leading to toxic myopathy, hypovolemic shock with reduced EF, cardiac arrest and/or need for resuscitation).Patients with life expectancy <1 year (palliative, terminal cancer)