Left Atrial Function in Patients with Reentrant Paroxysmal Supraventricular Tachycardia with Narrow QRS Complex - The Role of..
Sunday, June 01 2014 @ 05:28 EEST
Left Atrial Function in Patients with Reentrant Paroxysmal Supraventricular Tachycardia with Narrow QRS Complex - The Role of Speckle Tracking Echocardiography
Adriana Alexandrescu, S. Onciul, Ioana Petre, Oana Tautu, A. Scafa, Maria Dorobanțu
The reentrant paroxysmal supraventricular tachycardias with narrow QRS complex are in a large majority represented by atrioventricular reentrant tachycardia (AVRT) and atrioventricular nodal reentrant tachycardia (AVNRT). From an electrophysiological (EP) point of view the difference between the two forms is made by the type of the reentry circuit. That means that the former requires an accessory pathway with retrograde conduction while the latter implies the existence of perinodal pathways.
The left atrium (LA) is a part of the circuit in both types of arrhythmias. In sinus rhythm the left atrium has several functions: it acts as a conduit during protodiastole, it has a contractile function raising the filling pressure during atrial systole but it also has a reservoir function during ventricular systole. (1)View full article