平板运动试验时的心率血压反应与缺血阈值  

Responses of heart rate and blood pressure during treadmill exercise testing and ischemic threshold

作　　者：齐新[1] 刘克强[1] 汪莉[1] 杨英[1] 任涛[1] 吴崎 

机构地区：[1]天津市第一中心医院心内科,300192

出　　处：《临床心电学杂志》2000年第2期73-75,共3页Journal of Clinical Electrocardiology

摘　　要：目的　研究平板运动试验时的心率血压反应与缺血阈值。方法　选择不典型胸痛的病人 5 76例 ,男 36 8例 ,女 2 0 8例 ,年龄为 40～ 6 0岁之间 ,采用 Marquette MAX- 1活动平板 ,Bruce修正方案 ,运动过程中监测心率、血压的变化。结果　所有受检者均已达到最大预计心率的 85 %以上 ,但运动试验阳性组所达到的心率、及运动时间 ( T)低于其他组 ,最大 ST段 /心率斜率 ( maxial ST/ HR slope)、代谢当量 ( Mets)三组之间的差异显著 ( P<0 .0 1)。运动试验开始前三组受检者的 HR,SBP,DBP及其心率血压乘积 ( HR×SBP,mm Hg/ min)均无显著差异 ( P>0 .0 5 ) ,当受检者运动达最大负荷时试验阳性组的最大心率显著低于阴性组 ( P<0 .0 5 ) ,但此时其收缩压显著高于阴性组 ( ( P<0 .0 5 ) ,女性 ST/ HR,SBP及心率血压乘积显著低于男性 ( P<0 .0 5 )。结论　单纯以心率作为缺血阈值是不能准确反映运动中的心肌氧耗量 。Objective To investigate the relationship between the responses of heart rate (HR) and blood pressure during treadmill exercise testing (TET) and ischemic threshold.Methods Treadmill (MAX-1) exercise testing was performed in 576 subjects because of chest discomfort by the standard modified Bruce protocol.Results There were significant differences in HR,total exercise time and maximal ST/HR slope between the possive and negative result groups.All patients achieved more than 85% of maximal aged-HR(P<005).No significant changes were observed in HR,SBP,DBP and the double products(HR× SBP,mmHg/min)before exercise,but the maximal HR and SBP significant changes when achieving the maximal workload,so that there was no significant difference in the double products between groups (P>005) ST/HR,SBP and double products were significant different between male and female group.Conclusion The double products predicting oxygen consumption during the TET was the index of ischemic threshold.

关 键 词：平板运动试验 缺血阈值 心北血压乘积 冠心病 

分 类 号：R540.4[医药卫生—心血管疾病]