Table 4.
Summary of symptomatic rhythms, symptomatic cardiac arrhythmias and serious outcomes.
| N = 240 (124/116) unless stated. Different denominators due to missing data *some participants had more than one symptomatic rhythm recorded | |||
|---|---|---|---|
| Intervention n = 124 |
Control n = 116 |
Total n = 240 |
|
| Symptomatic rhythm* | 69 (55.6%) |
11 (9.5%) |
80 (33.3%) |
| Sinus rhythm (40–100) | 48 | 5 | 53 |
| Sinus tachycardia (> 100) | 12 | 7 | 19 |
| Ectopics | 8 | 5 | 13 |
| Atrial fibrillation | 8 | 0 | 8 |
| SVT | 3 | 0 | 3 |
| Atrial flutter | 1 | 0 | 1 |
| Sinus bradycardia (< 40) | 0 | 1 | 1 |
| Atrial tachycardia | 0 | 0 | 0 |
| Ventricular tachycardia | 0 | 0 | 0 |
| Other rhythm | 1 | 2 | 3 |
| Method of diagnosis of symptomatic rhythm* | |||
| AliveCor | 65 | 0 | 65 |
| 24-hour Holter | 2 | 5 | 7 |
| 48-hour Holter | 1 | 2 | 3 |
| 7 + day Holter | 0 | 1 | 1 |
| Subsequent ED visit ECG | 2 | 1 | 3 |
| GP visit ECG | 0 | 2 | 2 |
| Symptomatic cardiac arrhythmia* |
11 (8.9%) |
1 (0.9%) |
12 (5.0%) |
| Atrial fibrillation | 8 | 0 | 8 |
| SVT | 3 | 0 | 3 |
| Sinus bradycardia (< 40) | 0 | 1 | 1 |
| Atrial flutter | 1 | 0 | 1 |
| Serious outcome* |
11 (8.9%) |
2 (1.7%) |
13 (5.4%) |
| All cause death | 0 | 1 | 1 |
| Major adverse cardiac events [MACE = myocardial infarction, life-threatening arrhythmia, insertion of a pacemaker or internal cardiac defibrillator, insertion of pacing wire] |
0 | 1 | 1 |
| Cardiac arrhythmia | 11 | 1 | 12 |
| Significant structural heart disease | 0 | 1 | 1 |
| Initiation of anti-arrhythmia medical therapy | 1 | 0 | 1 |
| Life-threatening arrhythmia [ventricular tachyarrhythmia, complete or 3rd degree heart block, second degree heart block type II, pause > 6 s, symptomatic bradycardia < 40 beats per minute] |
0 | 0 | 1 |