Prodromal angina within 24 hours before anterior myocardial infarction was associated with lower in-hospital mortality (6% vs. 14%) and improved 5-year survival (OR 0.49, p=0.04).
Cohort (n=350)
Does prodromal angina within 24 h before infarction improve 5-year survival in patients with anterior myocardial infarction?
Prodromal angina occurring shortly before anterior myocardial infarction is associated with better acute angiographic outcomes and improved 5-year survival, potentially due to ischemic preconditioning.
Odds Ratio: 0.49
p-value: p=0.04
OBJECTIVES: This study was undertaken to assess how prodromal angina affects long-term prognosis after acute myocardial infarction. BACKGROUND: Although it has been reported that prodromal angina occurring shortly before the onset of acute myocardial infarction has protective effects against ischemia, its implication for long-term prognosis remains unclear. METHODS: We studied consecutive 350 patients with anterior myocardial infarction who underwent coronary angiography within 24 h after the onset of chest pain. Follow-up was achieved for 340 patients (97%). RESULTS: Eighty-nine patients had one or more episodes of angina within 24 h before infarction. On initial angiography, patients with prodromal angina in the 24 h before infarction had a patent infarct-related artery more frequently than did those without prodromal angina (34% vs. 22%, p = 0.03). Among 213 patients who underwent thrombolytic therapy for an occluded infarct-related artery, reperfusion was more frequently achieved in patients with prodromal angina in the 24 h before infarction (76% vs. 56%, p = 0.01). Prodromal angina in the 24 h before infarction was associated with a lower in-hospital mortality rate (6% vs. 14%, p = 0.02) and better 5-year survival (p = 0.009). There was no significant difference in survival between patients with previous angina at any time (n = 202) and those without. Multivariate analysis showed that prodromal angina in the 24 h before infarction was an independent factor related to 5-year survival after acute myocardial infarction (odds ratio 0.49, p = 0.04). CONCLUSIONS: Prodromal angina occurring shortly before the onset of infarction, but not previous angina itself, has a beneficial effect on long-term prognosis after infarction, suggesting a relation to ischemic preconditioning.
“Even before we began treating heart attack patients with angioplasty and stenting, physicians recognized that patients with chest pain prior to their heart attack seem to have better outcomes.”
Ishihara et al. (Wed,) conducted a cohort in Anterior myocardial infarction (n=350). Prodromal angina within 24 hours before infarction vs. No prodromal angina within 24 hours before infarction was evaluated on 5-year survival (OR 0.49, p=0.04). Prodromal angina within 24 hours before anterior myocardial infarction was associated with lower in-hospital mortality (6% vs. 14%) and improved 5-year survival (OR 0.49, p=0.04).