Unfolding the secrets of Inter nodal pathways !

Image source and courtesy http://www.heart-consult.com Take Our Poll (function(d,c,j){if(!d.getElementById(j)){var pd=d.createElement(c),s;pd.id=j;pd.src='https://s1.wp.com/wp-content/mu-plugins/shortcodes/js/polldaddy-shortcode.js';s=d.getElementsByTagName(c)[0];s.parentNode.insertBefore(pd,s);} else if(typeof jQuery !=='undefined')jQuery(d.body).trigger('pd-script-load');}(document,'script','pd-polldaddy-loader')); Answer I am afraid the 4th response is closer to truth .Readers may share their thoughts. If there are three distinct pathways   spreading widely connecting the two spacious chambers and   converging again with  precision at the compact  AV node , it  is a  marvel . Further , If these pathways are real ,  we must  experience different types of  inter nodal re-entrant  tachycardias.Of-course ,we do come across few macro re-entrant tachycardia in the form of atypical atrial flutters  They need a close  watch .Tracking these arrhythmia may throw light on existence of these pathways. However, the presence of nodal approaches  with preferential inputs to AV node from different parts of atria would indeed  suggest existence of such pathways ! Further study What does  sophisticated carto and other electro anatomic mapping say about these inter nodal pathways ? Reference An excellent article from imperial college London Heterogeneous three-dimensional anatomical and electrophysiological model of human atria . Seemann G, Höper C, Sachse FB, et al...
Source: Dr.S.Venkatesan MD - Category: Cardiology Authors: Tags: Atrial fibrillation cardiac physiology atrial conduction physiology electrophysiology of atrial conduction inter nodal conduction inter nodal pathway sa node to av node connection thorel bachman wenkeback pathways Source Type: blogs