Table 1 Baseline characteristics of the study population

Age, mean ± SD

61.5 ± 18.5 median 67 (23–85)

Gender, n (%)

30 Male (73.2 %) 11 female (26.8 %)

Indication of initial device implantation, n (%)

 Sick sinus syndrome

16 (39 %)

 Complete AV block

11 (26.8 %)

 Ventricular arrhythmias, heart failure

14 (34.2 %)

Implanted device, n (%)

 Single chamber PM,VVI/VDD

7 (17 %), 6 (14.8 %)

 Dual chamber PM

14 (34 %)

 Single chamber ICD

6 (14.8 %)

 Dual chamber ICD

7 (17 %)

 Biventricular ICD

1 (2.4 %)

Prevalence of diseases, n (%)

 Heart failure

12 (29.2 %)

 Coronary artery disease

13 (31.7 %)

 Valvular disease

2 (4.8 %)

 Hypertension

19 (46.3 %)

 Diabetes

7 (17 %)

 Congenital heart disease

3 (7.2 %)

 Chronic obstructive lung disease

2 (4.8 %)

 Chronic renal failure

2 (4.8 %)

 Hypertrophic cardiomyopathy

1 (2.4 %)

 Arrythmogenic right ventricular disease

1 (2.4 %)

 Cirrohis of liver

1 (2.4 %)

 Brugada syndrome

1 (2.4 %)