Table 1:
Demographics
| Variable | Case (n = 91) | Control (n = 1783) |
|---|---|---|
| Age (years) | 63.0±17.6 | 63.5±14.8 |
| Male | 53 (58%) | 1201 (67%) |
| ICU | 81 (89%) | 1322 (75%) |
| Arrest characteristics | ||
| Asystolea (bpm) | 16 (18%) | |
| Preceding HR ≤ 29 | 8 (50%) | |
| Preceding HR 30-49 | 1 (6%) | |
| Preceding HR 50-69 | 6 (38%) | |
| Preceding HR ≥ 70 | 1 (6%) | |
| PEA (bpm) | 75 (82%) | |
| Preceding HR ≤ 29 | 13 (17%) | |
| Preceding HR 30-49 | 24 (32%) | |
| Preceding HR 50-69 | 22 (29%) | |
| Preceding HR 70-89 | 9 (12%) | |
| Preceding HR ≥ 90 | 7 (9%) | |
| ROSC | 65 (71%) | |
| Survival to discharge | 26 (29%) | |
| Cardiac arrest cause | ||
| Respiratory – unintubated | 30 (33%) | |
| Respiratory - intubated | 14 (15%) | |
| Metabolic acidosis | 13 (14%) | |
| Hemorrhagic shock | 3 (3%) | |
| Cardiogenic shock | 6 (7%) | |
| Distributive shock | 1 (1%) | |
| Myocardial infarction | 2 (2%) | |
| Multiorgan failure | 14 (15%) | |
| Unknown | 8 (9%) | |
a
Asystole due to sinus arrest or complete AV block with no escape rhythm
Abbreviations. ICU: intensive care unit, HR: heart rate, bpm: beats per minute, PEA: pulseless electrical activity, ROSC: return of spontaneous circulation