J. J. Kane

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Although rapid atrial pacing is frequently used as a test of atrioventricular conduction, no studies have compared this method with other conduction parameters. The purpose of this study was to compare the results of rapid atrial pacing with refractory period measurements utilizing the extrastimulus technique. Determination of the refractory periods of the(More)
This study examines the effect of 2 hours of reperfusion on transiently ischemic myocardium in pigs. Indexes of myocardial viability measured were mitochondrial function, oxygen extraction, epicardial S-T segment change and distribution of tritiated digoxin. Results were as follows: (1) Mitochondrial function was markedly impaired in the reperfused area(More)
The effect of pulp chamber depth and extension into the root canal space on fracture resistance was examined on endodontically treated teeth with coronal-radicular amalgam restorations. Six groups of 10 mandibular molars were mounted in acrylic resin, and crowns were ground apically until the wall height of the pulp chamber was 2, 4, or 6 mm. Three(More)
To evaluate the refractory periods of the atrioventricular (A-V) conducting system in patients with a short P-R interval and normal QRS complex, 57 patients with a P-R interval of 110 to 280 msec were studied with His bundle recording and premature atrial stimulation at similar cycle lengths of 660 to 720 msec. In 13 patients with a short P-R interval (120(More)
Atrioventricular conduction patterns suggestive of dual A-V nodal pathways have been reported in patients with and without a history of paroxysmal A-V nodal re-entrant tachycardia (PSVT). The purpose of this study was to determine whether significant association exists between this conduction pattern and the occurrence of PSVT in man. The pattern of A-V(More)