Left and right bundle branch blocks are diagnosed and differentiated by looking at ECG recordings obtained from the CHEST leads, which register signal movements in a horizontal plane.

通过观察从胸导联获得的心电图记录，可诊断和鉴别左束支传导阻滞和右束支传导阻滞，这些心电图记录了信号在水平面上的运动。