Recovery of Impulse Propagation in the Bundle Branches of the Human HeartDuring the study and follow up of a large series of cases of intermittent bundle branch block (BBB), we observed that recovery of impulse propagation may occur in many different forms, encompassing a wide spectrum of ...
The relationships among the His bundle, the origin of both bundle branches, and the interventricular (IV) septum were examined histologically in 32 human hearts, and the entire bundle branch systems were delineated in 13 of these. The His bundle in five hearts traversed the right IV septal cres...
bundle of His (hĭs) n. The bundle of cardiac muscle fibers that conducts the electrical impulses that regulate the heartbeat, from the atrioventricular node in the right atrium to the septum between the ventricles and then to the left and right ventricles. Also calledatrioventricular bundle. ...
The meaning of BUNDLE BRANCH BLOCK is heart block due to a lesion in one of the bundle branches.
By modelling ventricular pacing and premature stimuli the inducibility of bundle branch re-entry was investigated. Under normal conditions bundle branch re-entry of type A and B were induced. A reduction of conduction velocity in the bundle branches resulted in multiple re-entrant echo beats as ...
The electrical discharge from the SA node passes across the atrium and reaches the atrioventricular (AV) node (see Fig. 1). Bundle Branch Block. Fig. 1 Sinus node, right and left bundle branches Full size image This is a preview of subscription content, log in via an institution to ...
Passage of current through the heart The initial signal originates at the sinoatrial node (SAN) It is conducted through the myocardium of the atria and then passes via the atrio ventricular node (AVN) to the bundle of His. This bundle then splits into two bundle branches (left and right)...
Heart attack ofheart failure Fainting or dizzying spells Chest pain Complications Blocks typically form on one side. But if both branches are blocked, it may disrupt your heart’s electrical activity. Tell your doctor if you’re having any of these symptoms: ...
M. GABRIELKHANMD, FRCP[C], FRCP[LONDON], FACP, FACC, inEncyclopedia of Heart Diseases, 2006 I.RIGHT BUNDLE BRANCH BLOCK The rightbundle branchis the continuation of the penetrating AV bundle and runs as a single discrete bundle beneath theendocardiumof theventricular septumto thebaseof the an...
ABBR: BBB A defect in the electrical conduction system of the heart in which there is failure of conduction down one of the main branches of the bundle of His. On the surface electrocardiogram, the QRS complex is >0.12 sec. and its shape is altered. ...