Article

Deadly association of cardiogenic shock and chronic total occlusion in acute ST-elevation myocardial infarction.

Quebec Heart-Lung Institute, Quebec, Canada.
American heart journal (Impact Factor: 4.56). 10/2012; 164(4):509-15. DOI: 10.1016/j.ahj.2012.07.008
Source: PubMed

ABSTRACT The association between cardiogenic shock and 1 or >1 chronic total occlusion (CTO) in unselected patients presenting with ST-elevation myocardial infarction (MI) (STEMI) has not been characterized.
Patients with STEMI referred with or without cardiogenic shock were categorized into no CTO, 1 CTO, and >1 CTO. The primary end point was the 30-day mortality.
Between 2006 and 2011, 2,020 consecutive patients were included. A total of 141 patients (7%) presented with cardiogenic shock on admission. The prevalence of 1 CTO and >1 CTO in a non-infarct-related artery was 23% and 5%, respectively, among patients with shock compared with 6% and 0.5% in patients without shock (P < .0001). Independent predictors of cardiogenic shock included left main-related MI (odds ratio [OR] 6.55, 95% CI 1.39-26.82, P = .019), CTO (OR 4.20, 95% CI 2.64-6.57, P < .001), creatinine clearance <60 mL/min (OR 3.41, 95% CI 2.32-4.99, P < .0001), and left anterior descending-related MI (OR 2.20, 95% CI 1.51-3.23, P < .0001). Thirty-day mortality was 100% in shock patients with >1 CTO, 65.6% with 1 CTO, and 40.2% in patients without CTO (P < .0001). After adjustment for left ventricular ejection fraction and renal function, CTO remained an independent predictor for 30-day mortality (hazard ratio [HR] 1.83; 95% CI 1.10-3.01, P = .02).
In patients with STEMI, CTO was strongly associated with cardiogenic shock on admission. In this setting, mortality was substantially higher in patients with 1 CTO and exceedingly high in those with >1 CTO. The presence of CTO was an independent predictor of early mortality.

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