The management of patients with acute myocardial infarction complicated by bundle branch block is a significant clinical problem and represents 8% to 13% of patients with acute infarction. This study reviews the records of 606 patients with myocardial infarction admitted to our coronary care unit. Forty-seven (8%) had complete bundle branch block. The risk of developing high-degree AV block in ...

Introduction Narrowing of the QRS and overcoming left bundle branch block (LBBB) with His bundle pacing (HBP) has been previously described. We present the first 2 reported cases of left bundle branch (LBB) delay with evidence of a split His electrogram during unipolar mapping from the tip of the His bundle (HB) lead during pacemaker implantation. These findings suggest that the site of LBB del...

In 1909 Eppinger and Rothberger showed that characteristic changes in the electrocardiogram arose after section of the right and left branches of the bundle of His in dogs, and the following year these experimental results were applied to human pathology, so that bundle branch block became a clinical concept. Since that time the electrocardiogram originally designated right branch block has com...

Ballstocad(liographic studies were done on 28 subjects with left bundle branch block and on 18 subjects with right bundle branch block. The influence of ventricular as nchronism, and the predominance of left or right ventricular disease, upon the derivation and interpretation of the ballistocar(liograsn, is discussed. The ballistocardiogram was found to be a valuable objective guide in the dete...

AIMS Left ventricular (LV) asynchrony assessment is mostly based on delays between regional myocardial velocity peaks. Regional function is barely considered. We propose apical transverse motion (ATM) as a new parameter integrating both temporal and functional information, which was tested in different conduction delays. METHODS AND RESULTS We examined 67 patients, 11 patients with post-infar...

A 49-year-old man with morbid obesity (6′5′′, 360 lbs), diabetes mellitus, hypercholesterolemia, and a history of systemic arterial hypertension had an aortic valve replacement for severe stenosis (aortic valve area, 0.9 cm2) with exertional dyspnea and left ventricular hypertrophy on echocardiogram. Immediately after operation an electrocardiogram was recorded (Figure 1). The electrocardiogram...

Multipoint 1 recording apparatus has been used to study the pattern of ventricular excitation in experimental bundle-branch block. After block, the wave of activation spreads uniformly from the contralateral ventricle across the septum to the free wall of the homolateral ventricle. Septal activation consumes more time than in the normal. Changes occur in the site and extent of early endocardia!...