On the basis of postulated relationships between autonomic activity and vulnerability to malignant ventricular arrhythmias, analysis of heart rate variability (HRV) has been proposed as a tool for identifying persons with altered autonomic activity, and thus who may be at high risk of sudden cardiac death (SCD). Discrete power spectral components of HRV have been previously identified and physiologic origins attributed to each. The power spectrum of HRV was estimated from 24-h ambulatory ECG recordings, using P. D. Welch's (1967) variant of the Bartlett procedure. Periods with ectopy or noise were discarded. This method was used to analyze 24-h ambulatory ECGs of patient populations at different degrees of risk of SCD. HRV was found to be reduced in cardiac patients known to be at increased risk of SCD, when compared with those not at increased risk.
|Original language||English (US)|
|Title of host publication||Computers in Cardiology|
|Number of pages||5|
|State||Published - Dec 1 1987|
ASJC Scopus subject areas
- Computer Science Applications
- Cardiology and Cardiovascular Medicine