Jayanthi Mohan Roop, Sasikumar Arun, Gorla Arun Kumar Reddy, Sood Ashwani, Bhattacharya Anish, Mittal Bhagwant Rai
Department of Nuclear Medicine, PGIMER, Chandigarh, India.
World J Nucl Med. 2017 Jan-Mar;16(1):78-80. doi: 10.4103/1450-1147.181157.
The occurrence of left bundle branch block (LBBB) in electrocardiogram during exercise testing is a relatively rare finding. The incidence of LBBB during exercise testing ranges from 0.5% to 1.1%. The mechanism of exercise-induced LBBB (EI-LBBB) is poorly understood, but ischemia is a proposed etiology. Stress myocardial perfusion imaging (MPI) can be useful in patients with EI-LBBB to rule out coronary artery disease. Adenosine vasodilator stress is the preferred mode of stress in patients with LBBB for performing stress-MPI. Here we present an interesting case of adenosine-induced LBBB during stress-MPI in a 67-year-old female patient with normal coronary angiography.
运动试验心电图中出现左束支传导阻滞（LBBB）是一种相对罕见的表现。运动试验期间LBBB的发生率为0.5%至1.1%。运动诱发的左束支传导阻滞（EI-LBBB）的机制尚不清楚，但缺血是一种推测的病因。负荷心肌灌注成像（MPI）对EI-LBBB患者排除冠状动脉疾病可能有用。腺苷血管扩张剂负荷是LBBB患者进行负荷MPI时首选的负荷方式。在此，我们报告一例67岁女性患者，冠状动脉造影正常，在负荷MPI期间出现腺苷诱发的LBBB的有趣病例。
