The electrocardiographic pattern of right bundlebranch block in the precordial leads associated with left axis deviation in the limb leads has been noted by others. Wilson, Johnston, and Barker (1934) were the first to describe a small wide R and S wave in lead I, with a wide and deep S wave in leads II and III, and a typical RBBB pattern in the praecordial leads. Recently, Lepeschkin (1964) re...

Electrophysiological and histological correlation was documented in 2 cases of complete heart block (CHB). Case 1 (77 yrs. female): CHB continued for 1.5 years with normal QRS in axis and duration. The His bundle electrogram (HBE) showed A-H block with normal H-V interval (40 msec). Ten months later she died of bronchopneumonia and paralytic ileus. Histological study of the conduction system re...

A patient with tricuspid atresia and characteristic electrocardiographic features of counterclockwise and superiorly oriented frontal plane QRS loop (left anterior hemiblock) is presented. Operative intervention resulted in a clockwise and inferior rotation of the frontal QRS loop (left posterior hemiblock) without the development of complete left bundle branch block. This observation suggests ...

Four cases of complete right bundle-branch block and one case of atrioventricular heart block, all occurring within three generations of the same family, are described. The 4 patients with bundle-branch block had no symptoms, whereas the patient with atrioventricular heart block suffered Adams-Stokes attacks from the age of 13 and died at 47 years of age. A 33-year-old man with bundle-branch bl...

This study concerns two cases of chronic 2 degrees atrioventricular (A-V) block with left bundle branch block (LBBB). Pathological studies included serial section of the conduction systems. Case 1 had type I 2 degrees block with LBBB. Electrophysiological studies revealed type I 2 degrees block proximal to the His bundle recording site and a prolonged H-V interval (60 msec). Pathologically ther...

(ILBBB) has received scant attention in the literature as an elec-trocardiographic entity, seemingly due to its multiple etiologies and its superficial resemblance to left ventricular preponderance (LVP) ,** and left ventricular is-chemia. In a review of current texts, Fried-berg,1 Lipman and Massie,2 Wolff3 and Levine4 stress the difficulty in electrocardio-graphically differentiating the ILBB...