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Electrophysiological behavior of atrioventricular node after selective fast or slow pathway ablation in patients with atrioventricular nodal reentrant tachycardia. 1993

M R Jazayeri, and M Akhtar
Electrophysiology Laboratory, University of Wisconsin, Milwaukee.

One hundred twenty consecutive patients with symptomatic atrioventricular nodal reentrant tachycardia (AVNRT) underwent catheter ablation using radiofrequency energy. Fast pathway ablation was attempted in the first 16 consecutive patients by application of radiofrequency current in the anterior and superior aspect of the tricuspid annulus. Successful results were accomplished in 13 patients, complete atrioventricular (AV) block occurred in three. One hundred four patients underwent ablation of the slow pathway in the posterior and inferior aspect of the tricuspid annulus, which was successful in 98 patients. The remaining six patients subsequently underwent a fast pathway ablation with successful results in four and AV block in two. Therefore, 102 (98%) of the last 104 patients became free of AVNRT while maintaining intact AV conduction. This study characterizes the electrophysiological properties of the residual AV node following a selective fast or slow pathway ablation.

UI MeSH Term Description Entries
D012032 Refractory Period, Electrophysiological The period of time following the triggering of an ACTION POTENTIAL when the CELL MEMBRANE has changed to an unexcitable state and is gradually restored to the resting (excitable) state. During the absolute refractory period no other stimulus can trigger a response. This is followed by the relative refractory period during which the cell gradually becomes more excitable and the stronger impulse that is required to illicit a response gradually lessens to that required during the resting state. Period, Neurologic Refractory,Periods, Neurologic Refractory,Refractory Period, Neurologic,Tetanic Fade,Vvedenskii Inhibition,Wedensky Inhibition,Inhibition, Vvedenskii,Inhibition, Wedensky,Neurologic Refractory Period,Neurologic Refractory Periods,Neuromuscular Fade,Neuromuscular Transmission Fade,Refractory Period, Neurological,Refractory Periods, Neurologic,Electrophysiological Refractory Period,Electrophysiological Refractory Periods,Fade, Neuromuscular,Fade, Neuromuscular Transmission,Fade, Tetanic,Neurological Refractory Period,Neurological Refractory Periods,Refractory Periods, Electrophysiological,Refractory Periods, Neurological,Transmission Fade, Neuromuscular
D002036 Bundle of His Small band of specialized CARDIAC MUSCLE fibers that originates in the ATRIOVENTRICULAR NODE and extends into the membranous part of the interventricular septum. The bundle of His, consisting of the left and the right bundle branches, conducts the electrical impulses to the HEART VENTRICLES in generation of MYOCARDIAL CONTRACTION. Atrioventricular Bundle,Anterior Fascicle,Kent-His Bundle,Left Bundle Branch of His,Posterior Fascicle,Right Bundle Branch of His,Atrioventricular Bundles,Bundle, Atrioventricular,Bundle, Kent-His,Bundles, Atrioventricular,Fascicle, Anterior,Fascicle, Posterior,His Bundle,Kent His Bundle
D004562 Electrocardiography Recording of the moment-to-moment electromotive forces of the HEART as projected onto various sites on the body's surface, delineated as a scalar function of time. The recording is monitored by a tracing on slow moving chart paper or by observing it on a cardioscope, which is a CATHODE RAY TUBE DISPLAY. 12-Lead ECG,12-Lead EKG,12-Lead Electrocardiography,Cardiography,ECG,EKG,Electrocardiogram,Electrocardiograph,12 Lead ECG,12 Lead EKG,12 Lead Electrocardiography,12-Lead ECGs,12-Lead EKGs,12-Lead Electrocardiographies,Cardiographies,ECG, 12-Lead,EKG, 12-Lead,Electrocardiograms,Electrocardiographies, 12-Lead,Electrocardiographs,Electrocardiography, 12-Lead
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001283 Atrioventricular Node A small nodular mass of specialized muscle fibers located in the interatrial septum near the opening of the coronary sinus. It gives rise to the atrioventricular bundle of the conduction system of the heart. AV Node,A-V Node,Atrio-Ventricular Node,A V Node,A-V Nodes,AV Nodes,Atrio Ventricular Node,Atrio-Ventricular Nodes,Atrioventricular Nodes,Node, A-V,Node, AV,Node, Atrio-Ventricular,Node, Atrioventricular,Nodes, A-V,Nodes, AV,Nodes, Atrio-Ventricular,Nodes, Atrioventricular
D013611 Tachycardia, Atrioventricular Nodal Reentry Abnormally rapid heartbeats caused by reentry of atrial impulse into the dual (fast and slow) pathways of ATRIOVENTRICULAR NODE. The common type involves a blocked atrial impulse in the slow pathway which reenters the fast pathway in a retrograde direction and simultaneously conducts to the atria and the ventricles leading to rapid HEART RATE of 150-250 beats per minute. Atrioventricular Nodal Re-Entrant Tachycardia,Atrioventricular Nodal Reentry Tachycardia,Atrioventricular Reentrant Tachycardia,Tachycardia, AV Nodal Reentrant,AV Nodal Reentrant Tachycardia,Atrioventricular Nodal Reentrant Tachycardia,Atrioventricular Nodal Re Entrant Tachycardia,Atrioventricular Reentrant Tachycardias,Reentrant Tachycardia, Atrioventricular,Tachycardia, Atrioventricular Reentrant
D014261 Tricuspid Valve The valve consisting of three cusps situated between the right atrium and right ventricle of the heart. Tricuspid Valves,Valve, Tricuspid,Valves, Tricuspid
D017115 Catheter Ablation Removal of tissue with electrical current delivered via electrodes positioned at the distal end of a catheter. Energy sources are commonly direct current (DC-shock) or alternating current at radiofrequencies (usually 750 kHz). The technique is used most often to ablate the AV junction and/or accessory pathways in order to interrupt AV conduction and produce AV block in the treatment of various tachyarrhythmias. Ablation, Transvenous Electric,Catheter Ablation, Electric,Catheter Ablation, Percutaneous,Catheter Ablation, Radiofrequency,Catheter Ablation, Transvenous,Ablation, Catheter,Ablation, Transvenous Electrical,Catheter Ablation, Electrical,Electric Catheter Ablation,Electrical Catheter Ablation,Percutaneous Catheter Ablation,Radiofrequency Catheter Ablation,Transvenous Catheter Ablation,Ablation, Electric Catheter,Ablation, Electrical Catheter,Ablation, Percutaneous Catheter,Ablation, Radiofrequency Catheter,Ablation, Transvenous Catheter,Electric Ablation, Transvenous,Electrical Ablation, Transvenous,Transvenous Electric Ablation,Transvenous Electrical Ablation

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