Spontaneous baroreflex sensitivity: Prospective validation trial of a novel technique in survivors of acute myocardial infarction

flex sensitivity assessed by means of the correlation method; BRSPRSA baroreflex sensitivity assessed by means of phase-rectified signal averaging; BRSSEQ baroreflex sensitivity assessed by means of the sequence method; BRSTF baroreflex sensitivity assessed by means of the transfer function method; CI confidence interval; ECG electrocardiogram; GRACE Global Registry of Acute Coronary Events; HR hazard ratio; LVEF left ventricular ejection fraction; MI myocardial infarction; ROC receiver-operator characteristic; SBP systolic blood pressure