All procedures were performed according to the Declaration of Helsinki and were approved by the local ethics committee. Informed consent was obtained from all patients. Human atrial myocardium from patients with sinus rhythm or atrial fibrillation was acquired from atrial resections during open heart surgery (for patient characteristics, see Table Table1).1). For molecular purposes, we utilized left ventricular myocardium from healthy donor hearts that were not transplanted due to technical reasons.
Clinical characteristics of patients with sinus rhythm (n = 34) and patients with atrial fibrillation (n = 10)
Values are mean ± SEM or n (%). Clinical data could not be completely obtained from every patient
EF ejection fraction, ACE angiotensin-converting enzyme, PDE phosphodiesterase
aBlinded due to ethical reasons
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