Baseline characteristics at the time of pacemaker implantation
| Patient’s characteristics | AAIR | DDDR-s | DDDR-l |
|---|---|---|---|
| Continuous data are mean (SD), other variables reported as number of patients. | |||
| AAIR, rate adaptive single chamber atrial pacing; DDDR-l, DDDR with a fixed long atrioventricular delay; DDDR-s, DDDR with a short rate adaptive atrioventricular delay; NYHA, New York Heart Association. | |||
| Number of patients | 54 | 60 | 63 |
| Age (years) | 74 (9) | 74 (9) | 74 (99 |
| Women | 31 | 34 | 39 |
| Mean follow up (years) | 3.1 (1.3) | 2.8 (1.5) | 2.8 (1.4) |
| Blood pressure (mm Hg) | |||
| Systolic | 145 (24) | 139 (22) | 144 (22) |
| Diastolic | 80 (13) | 75 (12) | 80 (10) |
| Arrhythmia indicating pacemaker treatment | |||
| Sinus bradycardia | 8 | 5 | 11 |
| Sino atrial block | 19 | 17 | 16 |
| Brady-tachy syndrome | 27 | 38 | 36 |
| Symptoms indicating pacemaker treatment | |||
| Syncope | 19 | 26 | 24 |
| Dizzy spells | 34 | 32 | 34 |
| Heart failure | 1 | 2 | 5 |
| Coronary artery disease | 21 | 25 | 22 |
| Diabetes mellitus | 6 | 6 | 7 |
| Prior stroke | 2 | 9 | 9 |
| NYHA functional class | |||
| I | 32 | 38 | 46 |
| II | 18 | 22 | 14 |
| III | 2 | 3 | |
| IV | 1 | ||
| Electrocardiographic parameters | |||
| PQ interval (ms) | 186 (27) | 183 (28) | 184 (27) |
| Medication | |||
| β Blocker | 4 | 5 | 7 |
| Calcium blocker | 14 | 7 | 11 |
| Digoxin | 11 | 9 | 11 |
| Sotalol | 7 | 8 | 10 |
| Aspirin | 35 | 40 | 36 |
| Warfarin | 5 | 5 | 11 |