Characterization of Arrhythmia-induced Cardiomyopathy

Data collection: Major adverse cardiovascular event (MACE) assessment questionnaire (prospective part). The assessment will be done via mail, letter or phone

"Data collection: Quality of Life (QoL) Questionnaire (prospective part). The questionnaire EQ-5D-5L questionnaire will be used to assess quality of life."

Anonymized search and review of patients electronic health records of the University Hospital of Basel for patients with a reduced LVEF and a concomitant (±1year or after any observation of a reduced LVEF in imaging) diagnosis of arrhythmia known to be causing AiCM.

Data collection on alcohol consumption, family history, rhythm disorder, hospitalizations, cardiac assessments, adverse events at baseline, 6 months, 1 year, 2 years and 5 years.