Table 2.
Presenting EMS Rhythm and EMS CPR
| Bystander Witnessed | Unwitnessed | ||||||
|---|---|---|---|---|---|---|---|
| All Treated Cardiac Arrest | EMS Witnessed | Bystander CPR | No bystander CPR | Bystander CPR | No bystander CPR | p-value | |
| Total | 9991 | 1022 | 1898 | 2206 | 1471 | 3394 | |
| VT/VF1 | 2446 (25%) | 245 (25%) | 805 (45%) | 710 (33%) | 229 (16%) | 457 (14%) | <0.001* |
| PEA | 2050 (21%) | 424 (43%) | 343 (19%) | 560 (26%) | 177 (12%) | 546 (16%) | |
| Asystole | 3999 (41%) | 173 (18%) | 474 (26%) | 653 (30%) | 852 (60%) | 1847 (56%) | |
| AED No Shock | 949 (10%) | 75 (8%) | 132 (7%) | 206 (10%) | 140 (10%) | 396 (12%) | |
| Cannot Determine | 228 (2%) | 61 (6%) | 47 (3%) | 32 (1%) | 24 (2%) | 64 (2%) | |
| Missing Rhythm2 | 319 (3%) | 44 (4%) | 97 (5%) | 45 (2%) | 49 (3%) | 84 (2%) | |
| EMS CPR3 | 9864 (99%) | 973 (96%) | 1863 (98%) | 2190 (99%) | 1466 (100%) | 3372 (99%) | <0.001 |
| Missing EMS CPR2,3 | 8 (0.1%) | 7 (0.7%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 1 (0.0%) | |
Data presented as N (%).
1
VT/VF includes AED shock recommended.
2
Missing is percent of total- all others are percent of reported.
3
Reported manual or mechanical chest compressions.
P-values computed with chi square test.
*
p-value for difference of first available rhythm (all categories except missing).