PURPOSE: The purpose of this study was to compare left ventricular hypertrophy and body composition between patients with exercise induced hypertension(EIH) accompanied by coronary artery disease and those with non-exercise induced hypertension(NEIH) and to examine the correlation between systolic blood pressure and body mass index(BMI), waist-hip ratio(WHR), left ventricular mass(LVM), and left ventricular mass index(LVMI).
METHODS: This study aimed at 66 patients including 33 patients with EIH and 33 ones with NEIH after treating coronary artery disease. Echocardiography, graded exercise test(GTX), and body fat of the two groups were measured to compare the two groups.
RESULTS: According to the results of this study, LVM and LVMI, determinants of LVH, were significantly increased(p<.01, p<.05) more in the group with EIH than in that with NEIH. Regarding blood pressure reaction during maximal exercise, the EIH group indicated significant increase(p<.05, p<.01) in both systolic blood pressure and diastolic blood pressure than the NEIH group did. On the other hand, maximal rate perceived exertion(MRPE) was significantly lower(p<.05) in EIH group than in the NEIH group. With regard to body composition, the EIH group showed more significant increase(p<p<.05, p<.05) in WHR and BMI than the NEIH group. The result of examination on the correlation between the general maximal systolic blood pressure and BMI, LVM, and LVMI indicated a weak correlation(r=0.33,r=0.31, r=0.37, r=0.34) respectively
CONCLUSIONS: In conclusion, LVH and the degree of obesity were significantly increased in the group of patients with hypertension accompanied by coronary artery disease showing exaggerated BP despite of medicinal control during exercise stress test. Since the result indicated that MRPE was significantly lower in the EIH group than in the NEIH group, moreover, doctors have to be careful in prescribing exercise. The result showing systolic blood pressure had a weak correlation with BMI, WHR, LVM, and LVMI suggested that more complete blood pressure control and improvement of obesity would be needed while the EIH group exercises.