Acute cardiac care & resuscitationCohort study
Electrocardiogram Abnormalities and the Risk of Out-of-Hospital Cardiac Arrest: A Nationwide Cohort Study
- Nationwide Cohort Study
Authors' conclusion
This nationwide study of over two million patients, spanning almost 20 years, showed that several ECG abnormalities were associated with increased 5-year risk of OHCA.
Study context
- Population
- Patients with a first-recorded ECG, from hospital or ambulance setting, in the Danish Nationwide Electrocardiogram Cohort and Danish Cardiac Arrest Registry
- Participants
- 2,155,155 patients
- Exposure
- 5-year OHCA risk for different ECG abnormalities
Main finding
As reported in the abstract
normal electrocardiograms (ECGs)
0.50%
95% CI 0.49–0.51%
atrial fibrillation
0.61%
95% CI 0.58–0.64%
left bundle branch block
0.73%
95% CI 0.68–0.78%
intraventricular conduction delay
0.68
95% CI 0.63–0.73
left posterior fascicular block
0.87%
95% CI 0.67–1.06%
Q-wave
0.59%
95% CI 0.57–0.61%
ST-depression
0.67%
95% CI 0.64–0.71%
left ventricular hypertrophy
0.74%
95% CI 0.71–0.77%
QTc prolongation
0.84%
95% CI 0.81–0.86%
Observational data: associations, not effects.
Original publication
Summarised from the published abstract; every number is checked against it