An International Journal for Biomedical Sciences - Biomedicine

Heart rate reserve in the evaluation of chest pain
capacity, cardiovascular risk factors, and ST
segment depression. Results of this study was
similar to Jouven et al(11) reported that impaired
ability to increase HR during exercise stress
testing is a powerful predictor of the risk of
cardiovascular mortality in 5713 asymptomatic
subjects. However, the underlying mechanisms
are not completely understood.
Chin et al (14) reported that 72% of the patients
with chronotropic incompetence had significant
coronary heart disease. Patterson et al(15).
showed that achieving