Cardiac arrest & resuscitation
Initial cardiac rhythm and rhythm conversion recorded by public access defibrillators
Main finding · ROSC and 30-day survival by initial rhythmResult — go to the resultOdds ratio 9.02 95 % CI 4.99–16.9Authors' conclusion
Initial PAD-recorded rhythm is an important prognostic factor in OHCA. Survival is poor in non-shockable cases, even with rhythm conversion.
Study context
- Population
- Out-of-hospital cardiac arrest (OHCA) cases with bystander-used PAD data, Denmark, 2016–2021559 with PAD data
- Participants
- 3,179 cases
- Exposure
- Initial shockable vs non-shockable PAD-recorded rhythm
- Shockablen = 152
- Outcome
- Cardiac rhythms recorded by public access defibrillators (PADs) and survival
- Follow-up
- 30 days
Methodological detailsDanish Cardiac Arrest Registry, multivariable logistic regression
- Danish Cardiac Arrest Registry
- Multivariable logistic regression
Main finding
ROSC and 30-day survival by initial rhythm
Odds ratio
9.02
95 % CI 4.99–16.9
By group
Shockable
- ROSC
- 61 % (n = 93)
- 30-day survival
- 40 % (n = 61)
Non-shockable
- ROSC
- 17 % (n = 69)
- Survival
- 5 % (n = 20)
ROSC
Shockable61 % (n = 93)
Non-shockable17 % (n = 69)
30-day survival
Shockable40 % (n = 61)
Non-shockable— not stated in the abstract
Survival
Shockable— not stated in the abstract
Non-shockable5 % (n = 20)
Shockable vs Non-shockable
OR 9.02 (95 % CI 4.99–16.9)
As reported in the abstract
- Initial shockable rhythm
- 26 % (n = 152)
Observational data: associations, not effects.
Further findings
Baseline characteristics
Males Shockable 75.7 % · Non-shockable 58.7 %
| Outcome | OR (95 % CI) | P value | |
|---|---|---|---|
| Conversion to shockable rhythm and survivalConversion vs No conversion · survival | 0.82 (0.25–2.25) | P = 0.41 | |
| 0.20.5125Odds ratio (log scale) |
- Conversion to shockable rhythm and survival: Conversion 8.8 % · Survival 10 %
- Conversion to shockable rhythm and survival: No conversion Survival 4.5 %
Survival with >5 consecutive shockable rhythms
- No patients survived
Original publication
Initial cardiac rhythm and rhythm conversion recorded by public access defibrillators. Resuscitation. Published 23 September 2025. doi:10.
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