Four components of the heart period power spectrum—ultra low frequency (< 0.0033 Hz),
very low frequency (0.0033 to< 0.04 Hz), low frequency (0.04 to< 0.15 Hz) and high …

Objectives. To determine whether spectral measures of heart period (RR) variability predict
death when measured late after infarction, we studied patients in the Cardiac Arrhythmia …

Seven hundred fifteen participants from a multicenter natural history study of acute
myocardial infarction were studied (1) to determine the correlations among time and …

To determine the reproducibility of frequency domain measures of heart period variability in
patients with previous myocardial infarction, 2 random samples of 40 patients each (1 from …

BACKGROUND We studied 715 patients 2 weeks after myocardial infarction to establish the
associations between six frequency domain measures of heart period variability (HPV) and …

Study objective–The study examined heart rate variability to find out whether shorter ECG
records can predict long term mortality following acute myocardial infarction as efficiently as …

The relation between heart rate variability, measured from standard 24 hour
electrocardiogram recordings in patients convalescent after a myocardial infarction, and the …

BACKGROUND We studied 715 patients 2 weeks after myocardial infarction to test the
hypothesis that short-term power spectral measures of RR variability (calculated from 2 to 15 …

Several time and frequency domain measures of heart period variability are reduced 1 to 2
weeks after myocardial infarction, and a reduced standard deviation of normal RR intervals …

This study examined heart rate (HR) variability in patients surviving acute myocardial
infarction (AMI) to find the optimum time and duration of recording of the ambulatory …