Types of Heart Blocks, Narrated Animation Part 1 скачать в хорошем качестве

Types of Heart Blocks, Narrated Animation Part 1

Purchase a license to download a non-watermarked version of this video on AlilaMedicalMedia(dot)com Check out our new Alila Academy - AlilaAcademy(dot)com - complete video courses with quizzes, PDFs, and downloadable images. ©Alila Medical Media. All rights reserved. Voice by: Abbie Drum All images/videos by Alila Medical Media are for information purposes ONLY and are NOT intended to replace professional medical advice, diagnosis or treatment. Always seek the advice of a qualified healthcare provider with any questions you may have regarding a medical condition. This part is an introduction to heart block, and major types of heart block. To be continued to part 2 about types of AV blocks in more details. The heart electrical signals are initiated in its natural pacemaker - the sinoatrial node, or SA node, and travel through the atria to reach the atrioventricular node, or AV node. The AV node is the gateway to the ventricles. The AV node passes the signals onto the bundle of His. This bundle is then divided into left and right bundle branches which conduct the impulses toward the apex of the heart. The signals are then passed onto fascicular branches, and spread through millions of Purkinje (pur-KIN-jee) fibres over the ventricular myocardium. Heart block is a group of diseases characterized by presence of an obstruction, or a “BLOCK” in the heart electrical pathway. A block may slow down the conduction of electrical impulses, OR, in more severe cases, completely stop them. Heart blocks are classified by location where the blockage occurs: SA nodal block, or SA block – blockage within the SA node. AV nodal block, or AV block – blockage at the level of the AV node. Intra-Hisian block- blockage within the bundle of His. Bundle branch block – blockage within left or right bundle branches. Fascicular block – blockage within the fascicles. Of these, AV blocks are most clinically significant. In fact, very commonly, the term “heart block “, if not specified otherwise, is used to describe AV blocks. In AV blocks, the electrical signals are slow to reach the ventricles, or are completely interrupted before reaching the ventricles.