One-Dimensional Mathematical Model of the Atrioventricular Node Including Atrio-Nodal, Nodal, and Nodal-His Cells

Incessant junctional reciprocating tachycardia caused by dual atrioventricular nodal pathways and atrio-nodal bypass tract.

A case is described with clinical and electrocardiographic findings of incessant junctional reciprocating tachycardia. Electrophysiological study showed that longitudinal dissociation of the atrioventricular node into two pathways was responsible for the maintenance of the arrhythmia. The two intranodal pathways had different refractory periods but reciprocally related and overlapping conductio...

Incessant junctional reciprocating tachycardia caused by dual atrioventricular nodal pathways and atrio - nodal bypass tract PIETRO

STJMMARY A case is described with clinical and electrocardiographic findings of incessant junctional reciprocating tachycardia. Electrophysiological study showed that longitudinal dissociation of the atrioventricular node into two pathways was responsible for the maintenance of the arrhythmia. The two intranodal pathways had different refractory periods but reciprocally related and overlapping ...

Atrioventricular nodal block with atrioventricular nodal reentrant tachycardia ablation.

Atrioventricular Nodal and Sinoatrial Nodal Function in Humans

A constant intravenous infusion of phenylephrine (0.74±0.41 ,ug/kg/min) was given to 10 patients to cause a continuous augmentation in reflex vagal tone. After the infusion, the diastolic blood pressure increased from 76±7 to 89±11 mm Hg (p<0.01). The sinus cycle length and atrial-His (AH) interval were measured, and incremental atrial pacing was performed before and during phenylephrine infusi...

Electrical excitability of atrioventricular nodal cells.

The electrical threshold of A-V nodal cells of isolated rabbit heart preparations was estimated by techniques which permitted stimulation and recording through the same micropipette. Cells within the node were significantly less excitable than adjacent atrial and ventricular tissues; thresholds exceeded 5 X 10~~° amp in some instances. Recovery of excitability was delayed well beyond repolariza...