Frequency of symptoms following pacemaker implantation
| Subject | Protocol | Age (years) | Asystole (s) | LOC | NM | NS | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ODO | VVI | DDD | ODO | VVI | DDD | ODO | VVI | DDD | |||||||||
| 1 | 1 | 4.1 | 16 | – | – | – | – | – | – | – | – | – | |||||
| 2 | 2 | 2.1 | 32 | 2 | 0 | 0 | 9 | 41 | 21 | 2 | 0 | 1 | |||||
| 3 | 3 | 8.5 | 22 | 0 | 0 | 0 | 0 | 0 | 0 | 57 | 54 | 27 | |||||
| 4 | 4 | 5.1 | 10 | 0 | 0 | 0 | 19 | 11 | 3 | 0 | 0 | 1 | |||||
| 5 | 5 | 3.1 | 10 | 0 | 0 | 0 | 8 | 7 | 5 | 0 | 1 | 0 | |||||
| 6 | 6 | 2.8 | 40 | 14 | 0 | 0 | 8 | 12 | 4 | 0 | 0 | 0 | |||||
| 7 | 1 | 2.6 | 19 | 3 | 0 | 0 | 14 | 2-150 | 2-150 | 0 | 2-150 | 2-150 | |||||
| 8 | 2 | 2.4 | 26 | 5 | 2 | 3 | 0 | 23 | 24 | 0 | 0 | 0 | |||||
| 9 | 3 | 2.0 | 22 | 8 | 0 | 0 | 4 | 10 | 4 | 3 | 0 | 0 | |||||
| 10 | 4 | 3.2 | 18 | 22 | 0 | 10 | 17 | 19 | 10 | 0 | 0 | 0 | |||||
| 11 | 5 | 14.7 | 28 | 4 | 0 | 0 | 1 | 1 | 0 | 0 | 13 | 0 | |||||
| 12 | 6 | 2.1 | 25 | 32 | 0 | 0 | 5 | 30 | 14 | 0 | 0 | 0 | |||||
↵2-150 The diaries of subject 7 were lost by the parents for the periods of VVI and DDD but the parents reported that there were no episodes of loss of consciousness during either of these periods and that they preferred the four months the pacemaker was programmed to DDD as there were fewer near misses.
Subject 1 was withdrawn from the study because the pacemaker was removed due to infection.
DDD, dual chamber pacing with rate drop response; LOC, full blown reflex anoxic seizure with loss of consciousness; NM, near miss; NS, non-specific symptoms such as dizziness, unsteadiness, etc; ODO, sensing only/no pacing; VVI, ventricular pacing with hysteresis.