Percutaneous coronary intervention and coronary artery bypass grafting yielded similar survival rates at 30 days (55.6% vs 57.4%; P=0.86) and 1 year (51.9% vs 46.8%; P=0.71) in cardiogenic shock.
RCT (n=128)
Does percutaneous coronary intervention compared to coronary artery bypass grafting improve survival in patients with acute myocardial infarction complicated by cardiogenic shock?
In patients with acute myocardial infarction complicated by cardiogenic shock, emergency CABG and PCI yielded similar 30-day and 1-year survival rates despite CABG patients having more extensive coronary disease and diabetes.
Absolute Event Rate: 55.6% vs 57.4%
p-value: p=0.86
BACKGROUND: The Should We Emergently Revascularize Occluded Coronaries for Cardiogenic Shock (SHOCK) trial demonstrated the survival advantage of emergency revascularization versus initial medical stabilization in patients developing cardiogenic shock after acute myocardial infarction. The relative merits of coronary artery bypass grafting (CABG) versus percutaneous coronary intervention (PCI) in patients with shock have not been defined. The objective of this analysis was to compare the effects of PCI and CABG on 30-day and 1-year survival in the SHOCK trial. METHODS AND RESULTS: Of the 302 trial patients, 128 with predominant left ventricular failure had emergency revascularization. The selection of revascularization procedures was individualized. Eighty-one patients (63.3%) had PCI, and 47 (36.7%) had CABG. The median time from randomization to intervention was 0.9 hours (interquartile range IQR, 0.3 to 2.2 hours) for PCI and 2.7 hours (IQR, 1.3 to 5.5 hours) for CABG. Baseline demographics and hemodynamics were similar, except that there were more diabetics (48.9% versus 26.9%; P=0.02), 3-vessel disease (80.4% versus 60.3%; P=0.03), and left main coronary disease (41.3% versus 13.0%; P=0.001) in the CABG group. In the PCI group, 12.3% had 2-vessel and 2.5% had 3-vessel interventions. In the CABG group, 84.8% received > or =2 grafts, 52.2% received > or =3 grafts, and 87.2% were deemed completely revascularized. The survival rates were 55.6% in the PCI group compared with 57.4% in the CABG group at 30 days (P=0.86) and 51.9% compared with 46.8%, respectively, at 1 year (P=0.71). CONCLUSIONS: Among SHOCK trial patients randomized to emergency revascularization, those treated with CABG had a greater prevalence of diabetes and worse coronary disease than those treated with PCI. However, survival rates were similar. Emergency CABG is an important component of an optimal treatment strategy in patients with cardiogenic shock, and should be considered a complementary treatment option in patients with extensive coronary disease.
White et al. (2005) conducted an RCT in Acute myocardial infarction complicated by cardiogenic shock (n=128). Percutaneous coronary intervention (PCI) vs. Coronary artery bypass grafting (CABG) was evaluated on 30-day survival (p=0.86). Percutaneous coronary intervention and coronary artery bypass grafting yielded similar survival rates at 30 days (55.6% vs 57.4%; P=0.86) and 1 year (51.9% vs 46.8%; P=0.71) in cardiogenic shock.