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Cardiac arrest

Smartphone CPR app: ROSC up, survival not

Association of a smartphone-based CPR assistance system with prehospital outcomes in out-of-hospital cardiac arrest: a pre–post observational study in Bangkok
Resuscitation Plus · Added 22 September 2026

Before–after study of 615 OHCA patients after the MySOS smartphone bystander-CPR app launched in Bangkok — post-implementation ROSC probability rose ~6 percentage points, but 24-hour and discharge survival showed no significant improvement

Study type

Cohort

Design

Retrospective uncontrolled before–after observational study with IPTW

Participants

615 OHCA patients in Bangkok (340 pre-, 275 post-implementation)

Main finding

Post-implementation ROSC probability higher (adjusted RD 6.28%, 95% CI 1.69–10.86; p=0.007), but RR not significant (1.21, 95% CI 0.78–1.89) and no significant improvement in 24-hour or discharge survival

Caveat

Uncontrolled before–after design without patient-level confirmation of actual app use; temporal confounding likely

Bottom line

Context only

Learning goal

Weigh the benefits and limitations of smartphone-activated bystander CPR systems for improving outcomes in out-of-hospital cardiac arrest.

More

• Topic: Cardiac arrest
• Daily scan: 22 September 2026

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