Abstract：This paper takes three patients definitely diagnosed with left bundle branch block(LBBB) for case study. Their routine electrocardiogram(ECG) and vectorcardiogram(VCG) were synchronously recorded. On the VCGs of two patients with true LBBB, the starting vector was oriented in the leftfront side with forward vector reduced; 20ms vector was oriented in the leftrear side operating in the form of an 8character shape; the central and terminal parts of the ring operated slowly. In one patient with left ventricular hypertrophy complicating branchtype complete LBBB(false LBBB), the starting vector was oriented in the rightfront side, 20ms vector was still leftfront oriented, and the amplitude of the maximal vector of QRS loop significantly increased. Combined with the patients clinical medical histories, VCG was found highly valuable in diagnosing true LBBB and made explanation of the additional ECG diagnostic criteria of true LBBB become possible.
王向涛, 潘二明, 张洪燕, 潘登, 潘月. 心电向量图在真性左束支阻滞鉴别中的应用[J]. 实用心电学杂志, 2019, 28(2): 115-119.
WANG Xiang-Tao, PAN 二Ming, ZHANG Hong-Yan, PAN Deng, PAN Yue. Application of vectorcardiogram in differentiating true left bundle branch block. JOURNAL OF PRACTICAL ELECTROCARDIOLOGY, 2019, 28(2): 115-119.
2019, Vol. 28 
