Oct 1, 1975

Dual atrioventricular nodal pathways. A common electrophysiological response

British Heart Journal
P DenesK M Rosen

Abstract

Evidence of dual atrioventricular nodal pathwats (a sudden jump in H1-H2 at critical A1-A2 coupling intervals) was shown in 41 out of 397 patients studied with atrial extrastimulus techniques. In 27 of these 41, dual pathways were demonstrable during sinus rhythm, or at a cycle length close to sinus rhythm (CL1). In the remaining 14, dual pathways were only demonstrated at a shorter cycle length (CL2). All patients with dual pathways at cycle length who were also tested at cycle length (11 patients) had dual pathways demonstrable at both cycle lengths. In these 11 patients both fast and slow pathway effective refractory periods increased with decrease in cycle length. Twenth-two of the patients (54%) had either an aetiological factor strongly associated with atrioventricular nodal dysfunction or one or more abnormalities suggesting depressed atrioventricular nodal function. Dvaluation of fast pathway properties suggested that this pathway was intranodal. Seventeen of the patients had previously documented paroxysmal supraventricular tachycardia (group 1). Eight patients had recurrent palpitation without documented paroxysmal supraventricular tachycardia (group 2), and 16 patients had neither palpitation nor paroxysmal supravent...Continue Reading

Mentioned in this Paper

Biochemical Pathway
Paroxysmal Reciprocal Tachycardia
Supraventricular Tachycardia
Heart Block
Depressed - Symptom
Sinus - General Anatomical Term
Hypertensive Disease
Cardiac Conduction System
Structure of Atrioventricular Node
Electrophysiology (Science)

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