Critical culprit lesion locations (CCLL) such as left main (LM) and proximal left anterior descending (LAD) are associated with worse clinical outcome in myocardial infarction without cardiogenic shock (CS). We aimed to assess whether CCLL identifies a subgroup of patients at poorer prognosis when presenting with CS.
Methods and results :
In the CULPRIT-SHOCK trial, a core-laboratory reviewed all coronary angiograms to identify CCLL. CCLL was defined as a culprit lesion realizing a >70% diameter stenosis of LM, LM equivalent (>70% diameter stenoses of both proximal LAD and proximal circumflex), proximal LAD or, last remaining vessel. We evaluated the primary study endpoint of the CULPRIT-SHOCK trial according to CCLL. A total of 269 (43%) out of 626 patients eligible for this analysis had a CCLL. Death or renal replacement therapy within 30 days, death within 30 days and within 1 year were significantly higher in CCLL than in non-CCLL group (58.4% vs. 43.4%, p<0.001, 55.8% vs . 39.5%, p<0.001, 61.0% vs. 44.5%, p<0.001, respectively). It was consistent after adjustment for baseline and angiographic characteristics. No interaction with the randomization group (culprit lesion-only or immediate multivessel PCI) was found.
CCLL is frequent in CS and independently associated with worse clinical outcome irrespective of the revascularization strategy.