J. T. Bigger

TL;DR: The relation between the heart period variability measures and all-cause mortality, cardiac death, and arrhythmic death before and after adjusting for five previously established postinfarction risk predictors is explored.

TL;DR: Examination of relationships among ventricular arrhythmias, left ventricular dysfunction, and mortality after the occurrence of myocardial infarction in 766 patients who enrolled in a nine-hospital study and underwent two special tests suggested a suggestion of an interaction between each risk variable and time afterinfarction.

TL;DR: It is found that power spectral measures of RR variability calculated from short (2 to 15 minutes) ECG recordings are remarkably similar to those calculated over 24 hours and are excellent predictors of all-cause mortality and sudden cardiac death.

TL;DR: Values of RR variability previously reported to predict death in patients with known chronic coronary heart disease are rarely found in healthy middle-aged individuals and should be rare when measures ofRR variability are used to screen groups of middle- aged persons to identify individuals who have substantial risk of coronary deaths or arrhythmic events.