Tolppanen H, et al. - Researchers assessed the prevalence, temporal evolution, association with clinical and angiographic parameters, and influence on 1-year mortality of ventricular conduction blocks (VCBs) in acute coronary syndromes (ACS)-related CS, using data of 199 patients from a prospective multinational cohort. At baseline, a VCB was detected in 50% of patients; these patients were older, had lower left ventricular function and had more often left main disease, relative to those without VCB. Patients at particularly high mortality risk in ACS-related CS were identified very early by any VCB at baseline ECG, even if transient. The predictive value of a VCB was found to be independent of baseline variables and coronary angiography findings.