The change and its clinical significance of deceleration capacity of heart rate in elderly coronary artery disease
10.3760/cma.j.issn.0254-9026.2013.08.010
- VernacularTitle:老年冠心病患者心率减速力的变化及其临床意义
- Author:
Simei CHEN
;
Yueping WU
- Publication Type:Journal Article
- Keywords:
Coronary disease;
Heart rate;
Arrhythmia,sinus
- From:
Chinese Journal of Geriatrics
2013;32(8):833-835
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the change and its clinical significance of the deceleration capacity (DC) of heart rate in elderly patients with coronary heart disease (CHD).Methods A total of 105 elderly CHD patients and 86 elderly non-CHD patients were selected.All patients underwent 24 h ambulatory electrocardiographic recording.DC,heart rate variability (HRV) time domain index,heart rate turbulence (HRT) parameters including turbulence onset (TO) and turbulence slope (TS),and the occurrence of ventricular arrhythmias were off-line calculated.Results The values of DC,HRV and HRT were decreased in elderly patients with CHD.DC had positive correlations with standard deviation of normal-to-normal intervals (SDNN),the square root of the mean squared successive differences between normal-to-normal RR intervals (rMSSD) and percentage of adjacent normal-to-normal intervals that differed more than 50 ms (pNN50) (r=0.60,0.51,0.49,0.41,respectively,all P ＜0.05) and had a negative correlation with the occurrence of ventricular arrhythmias (r=-0.34,P＜0.05).The value of DC was much decreased in elderly CHD patients with type 2 diabetic or acute myocardial infarction.Conclusions The decreased DC value is correlated with heart rate variability,turbulence slope and the occurrence of ventricular arrhythmias in elderly CHD patients.The deceleration capacity of heart rate is a better noninvasive method for screening and predicting sudden death in high-risk elderly patients with CHD.
