Clinical characteristics of the study population
  PAF Group (29) Chronic AF Group (9) Control Group (21)
Age 67 (± 9.8) 69 (± 9.6) 62 (± 15.3)
Gender male/female 18/11 6/3 10/11
Sinus bradycardia 1 (3%)    
Hypertensive crisis 2 (7%)    
Coronary 1 vessel disease 3 (10%)   3 (14%)
Coronary 2 vessel disease 1 (3%)   1 (5%)
Coronary 3 vessel disease 3 (10%)    
Ischemic cardiomyophathy   1 (11%)  
Unselected chronic heart disease 1 (3%)   2 (10%)
Diabetes mellitus 1 (3%)    
Sinus tachycardia   1 (11%)  
Orthostatic disorder   1 (11%)  
Medication      
Beta-blocking-agents 22 (76%) 4 (44%) 12(57%)
Calcium-channelblockers 1 (3%) 1 (11%)  
ACE inhibitor 3 (10%)    
AT1 inhibitor 3 (10%)    
Digitalis 2 (7%) 1 (11%)  
No medication     3 (14%)
Table 1: Clinical characteristics of patients. PAF = paroxysmal atrial fibrillation; Chronic AF = chronic atrial fibrillation; ACE = angiotensin-converting enzyme; AT1 inhibitor = angiotensin II type 1 receptor antagonist.