Table 1.
Baseline demographics and clinical characteristics
| Age <70 years (n = 259) | Age ≥70 years (n = 315) | P-value | |
|---|---|---|---|
| Male gender | 130 (50.2%) | 154 (48.9%) | 0.75 |
| Hypertension | 109 (42%) | 186 (59%) | 0.01 |
| Diabetes mellitus | 91 (35%) | 120 (38%) | 0.46 |
| Chronic renal failure | 16 (6%) | 32 (10%) | 0.09 |
| COPD | 44 (16%) | 59 (18%) | 0.59 |
| Body weight, kg | 79.6 ± 9.3 | 77.5 ± 8.3 | 0.01 |
| ECG findings | |||
| Complete AV block | 154 (59.5%) | 216 (68.6%) | 0.19 |
| Second degree | 48 (18.5%) | 47 (14.9%) | 0.49 |
| AV block | |||
| AF and bradycardia | 14 (5.4%) | 15 (4.8%) | 0.85 |
| Sick Sinus Syndrome | 23 (8.9%) | 16 (5.1%) | 0.30 |
| Sinusal pause | 8 (3.1%) | 11 (3.5%) | 0.88 |
| Advanced AV block | 5 (1.9%) | 4 (1.3%) | 0.77 |
| Trifascicular block | 1 (0.4%) | 4 (1.3%) | 0.26 |
| Nodal rhythm | 6 (2.3%) | 2 (0.6%) | 0.10 |
| Pacemaker type | |||
| DDD | 240 (92.7%) | 242 (76.8%) | 0.01 |
| VVI | 19 (7.3%) | 73 (23.2%) | |
Abbreviations: AF, atrial fibrillation; AV, atrioventricular; COPD, chronic obstructive pulmonary disease; DDD, dual chamber pacemaker; ECG, electrocardiogram; VVI, single chamber pacemaker.