earticle

영어

The purpose of this study is to investigate effects of graded exercise testing on cardiopulmonary system of patients with coronary artery disease taking beta blocker. The subjects of this study were patients with coronary artery diseases who were administered of beta blockers, and they were divided into group A (n＝32), failing to reach 85% of the target heart rate expected as 220-age; group B (n＝32), reaching the expected rate; and group C (n＝32), without administration of beta blockers, via the maximal exercise stress test. The subjects were tested of hemodynamic responses, cardiopulmonary strength, and recovery heart rate via the maximal exercise stress test. The results of this study showed that the RHR was significantly higher in group C than in group A and B (p＝.000), while the MHR was significantly lower in group A than in group B and C (p＝.000). The RSBP, the RDBP, the MSBP, and the MDBP showed no significant difference between the groups. The MRPP was significantly lower in group A than group B and C (p＝.000). The MT, the VO2max, and the MMET were significantly higher in group B than in group A and C, respectively (p＝.000). The recovery heart rate at the 1st minute and the 2nd minute was significantly higher in group B than group A and C. There was significant correlation between VO2max and the recovery heart rate at the 1st minute and the 2nd minute (R2＝.299, p＝.003 and R2＝.524, p＝.000, respectively). Conclusively, that patients with coronary artery diseases who are administered of beta blockers reach the targeted heart rate in maximal exercise may not be negative due to insufficient response to the agents or morbid excessive accentuation but may serve as a positive effect in further prognosis assessment because of higher cardiopulmonary strength and exercise tolerance.