TITLE:
Multi-center pragmatic studies evaluating the time indicator of cardiac perfusion reserve
AUTHORS:
Lin Xiong, Shouzhong Xiao, Qiang Zhou, Xianrong Wu, Zifu Xiao, Xingming Guo, Delin Lu, Wanrong Zhao, Xiaojun Wu, Xiaobo Yan, Yanxia Zhao, Jianming Liu
KEYWORDS:
Ratio of Diastolic to Systolic Duration (D/S); Accuracy; Precision; Cardiac Reserve; Cardiac Safety; Fitness
JOURNAL NAME:
Journal of Biomedical Science and Engineering,
Vol.6 No.1,
January
22,
2013
ABSTRACT: Background: Since the greater part of coronary blood flow takes place during the diastolic phase of each cardiac cycle, a time indicator of myocardial perfusion reserve, the ratio of diastolic to systolic duration (D/S ratio), was presented. The objective of this study was to evaluate the accuracy and precision, the biological implication, and the applications of D/S ratio. Methods: Multi-center pragmatic studies evaluating the time indicator of cardiac perfusion reserve were performed. Related experiments, clinical trials, and surveys were conducted at 5 centers. Results: The results showed that the measurement of D/S ratio is both accurate and precise; the mean values of D/S of all of the 3 species studied (human, rabbit, and rat) were greater than 1. These application studies on D/S ratio showed that a close negative correlation existed between D/S ratio and New York Heart Association Functional Classification (NYHA FC) (r = –0.659, p pregnant women with pre-eclampsia and either normal pregnant women or non-pregnant women were significant (p Conclusions: D/S ratio has important biological implication, which is a safe, easy, reliable, and effective indicator, can be used to evaluate fitness levels, served as a pathophysiological marker for screening of cardiovascular disease (CVD), for predicting risk of cardiac events, and for evaluating the severity and prognosis of CVD.