Key result
Primary percutaneous coronary intervention significantly reduced 30-day cardiac mortality (HR 0.28) and long-term cardiac mortality in high-risk STEMI patients, but showed no significant benefit in low-risk patients.
Why the study?
Does primary percutaneous coronary intervention reduce cardiac mortality in patients with ST-elevation myocardial infarction compared to conservative treatment across different disease severities?
Population
1,437 patients with ST-elevation acute myocardial infarction admitted within 12 hours of onset, drawn from a…
Comparison
Primary percutaneous coronary intervention (PPCI) vs Conservative treatment (no reperfusion therapy)
Design
Cohort
Follow-up
Mean 4.2 years
Authors
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May support risk-stratified PCI decisions in STEMI; leaves open randomized confirmation before practice change.
Cohort (n=1,437)
Yes
Does primary percutaneous coronary intervention reduce cardiac mortality in patients with ST-elevation myocardial infarction compared to conservative treatment across different disease severities?
Hazard Ratio: 0.28 (95% CI 0.18–0.44)
Absolute Event Rate: 10.8% vs 33%
p-value: p=<0.001
Primary PCI significantly improves survival in moderate- and high-risk STEMI patients, but may not offer a survival advantage over conservative management in low-risk patients.
Koyanagi et al. (2008) conducted a cohort in Acute ST-Elevation Myocardial Infarction (STEMI) (n=1,437). Primary percutaneous coronary intervention (PPCI) vs. Conservative treatment was evaluated on 30-day cardiac mortality in high-risk patients (TIMI-risk score ≥6) (HR 0.28, 95% CI 0.18-0.44, p=<0.001). Primary percutaneous coronary intervention significantly reduced 30-day cardiac mortality (HR 0.28) and long-term cardiac mortality in high-risk STEMI patients, but showed no significant benefit in low-risk patients.
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