부산대학교 도서관

This chapter highlights the key concepts related to the electrocardiogram (ECG) diagnosis of intraventricular conduction disturbances, including right and left bundle branch block. In both cases, but especially in left bundle branch block, the chapter discusses the diagnosis when the block is at a proximal level and in the fascicles. This includes the ECG diagnosis of the superoanterior and inferoposterior fascicles of the left bundle (the hemiblocks). The possible diagnosis of the block of middle fibres (septal fascicle) of left bundle is briefly mentioned. Finally, the ECG criteria for the diagnosis of bifascicular and trifascicular block are described. In all cases, the most important clinical implications of each diagnosis are discussed.