心肌灌注显像腺苷负荷试验致心电图改变分析

目的 评价腺苷负荷心肌灌注显像中患者的心电图变化.方法 回顾性分析2008年5月至12月完成腺苷负荷心肌灌注显像的641例患者腺苷药物负荷试验心电图变化和心肌灌注显像结果.统计学分析采用SAS 8.0软件,单因素分析采用t检验和χ2检验,多因素分析采用Logistic 回归分析.结果 腺苷注射前,641例患者中心电图正常436例（68.0%）,心电图异常205例（32.0%）.腺苷注射过程中新出现心律失常132例（20.6%,132/641）,其中房性早搏39例（29.5%）,室性早搏45例（34.1%）,窦房阻滞8例（6.1%）,一度房室传导阻滞7例（5.3%）,二度Ⅰ型房室传导阻滞26例（19.7%）,二度Ⅱ型房室传导阻滞6例（4.5%）,三度房室传导阻滞1例（0.8%）;需停药13例（9.8%）.腺苷注射终止后新出现心律失常28例（4.4%,28/641）,其中房性早搏16例（57.1%）,室性早搏11例（39.3%）,窦房阻滞1例（3.6%）.641例患者腺负荷试验中共35例（5.5%）出现心电图ST段压低＞0.1 mV,39例（6.1%）予停药处理,无一例急性心肌梗死及猝死;心肌灌注显像结果：36例心肌缺血改变,8例心肌梗死改变.Logistic回归分析示,用腺苷药前、中、后心律失常并不增加出现心肌缺血及心肌梗死改变的风险P=0.9613,比值比（OR）=0.982,95%可信区间（CI）0.471～2.046;P=0.9511,OR＜0.001,95%CI：＜0.001,＞999.999;P=0.9931,OR＜0.001,95%CI：＜0.001,＞999.999],并且腺苷注射过程中出现与未出现房室传导阻滞患者的阳性心肌灌注显像结果及ST段压低的发生率差异均无统计学意义（χ2=2.5298,0.5317,P均＞0.05）.ST段压低＞0.1 mV的患者出现阳性心肌灌注显像结果的风险增加（P=0.0005,OR=5.608,95%CI2.110～14.905）.结论 腺苷负荷试验过程中心电图异常发生率较高,但多为一过性,出现心律失常并不意味着有心肌缺血.

Alterations in electrocardiogram of adenosine test for 99Tcm-MIBI myocardial perfusion imaging

Objective To analyze alterations in electrocardiogram (ECG) of adenosine test in 99Tcm-MIBI myocardial perfusion imaging(MPI)SPECT study. Methods A total of 641 patients were in cluded in the study. The patients each underwent 99Tcm-MIBI MPI with adenosine test. The ECGs were taken before, during, and after adenosine infusion. Results In all, abnormal ECGs were found in 205(32.0%) patients. During adenosine infusion, 20.6%(132/641) of patients suffered from arrhythmia,29.5%(39/132) had atrial premature beats, 34. 1% (45/132) had premature ventricular beats, and 6. 1% (8/132) had sinoatrial block. In addition, 5.3% (7/132) had first-, 24.2% (32/132) had second-, and 0.8%(1/132) had third-degree atrioventricular block (AVB). After adenosine infusion, 4.4%( 28/641) of patients suffered from arrhythmia, 57.1% (16/28) had atrial premature beats, 39.3%(11/28) had premature ventricular beats, and 3.6% (1/28) had sinoatrial block. The perfusion images showed ischemia in 36 patients and infarction in 8 patients. Adenosine infusion was terminated in 39 patients (6. 1%) because of poorly tolerated side effects. However, no death or acute myocardial infarction occurred in the study. Conclusions Adenosine pharmacologic test for 99TcmMIBI MPI may result in relatively high incidence of arrhythmia in ECG monitoring.