With the use of His bundle electrograms, intra-atrial conduction delay has been found to be a cause offirstdegree heart block. Twenty-one patients with evidence of atrioventricular conduction defects or dysrhythmias were studied with His bundle electrograms and 2 were found to have delayed intra-atrial conduction while in sinus rhythm. A further 3 patients had normal PA intervals during sinus r...

The effects of torso inhomogeneities on electrocardiographic potentials were investigated via computer stimulation, using a 23-dipole heart model placed within a realistically shaped human torso model. The transfer coefficients relating the individual dipoles to the torso surface potentials, as well as the body surface potential maps, the vectorcardiogram, and the 12-lead electrocardiogram resu...

In humans, and certain animals, the atrioventricular conduction system is capable of bidirectional conduction. Depolarization impulses, originating in the ventricle itself, may thus be conducted in a retrograde direction towards the atria. Two common causes for this phenomenon of ventriculo-atrial (retrograde) conduction are premature ventricular complexes and ventricular pacing. The surface el...

We investigated whether the presence of J wave on the surface electrocardiography (sECG) could be a potential risk factor for ventricular fibrillation (VF) during acute myocardial infarction (AMI). We performed a retrospective study of 317 patients diagnosed with AMI in a single center from 2009 to 2012. Among the enrolled 296 patients, 22 (13.5%) patients were selected as a VF group. The J wav...

RECENTLY, a simple technic for electrode catheter recording of consistent and stable His bundle activity was described, first in the dog" 2 and then in man.3 In the short time since the introduction of this technic there have been numerous reports utilizing His bundle recordings. These studies have confirmed many of the earlier ingenious deductions made by clinical electrocardiographers utilizi...

We report the discovery of a new radio galaxy within the location error box of the γ-ray source 3EG J1735−1500. The galaxy is a double-sided jet source forming a large angle with the line of sight. Optical observations reveal a V ∼ 18 magnitude galaxy at the position of the radio core. Although the association with the EGRET source is not confirmed at the present stage, because there is a compe...