Differences in the determinants of overdrive suppression between sinus rhythm and slow atrioventricular junctional rhythm.

Differences in the determinants of overdrive suppression between sinus rhythm and slow atrioventricular junctional rhythm.

Sinus node recovery time was compared to the recovery time of a slow atrioventricular junctional rhythm in each of the same seven pentobarbital anesthetized dogs. Recovery time and the first five cardiac cycles were examined after pacing atria and ventricles for 20, 40, and 60 seconds at four or more pacing cycle lengths. Data relating recovery times and return to control conditions to prepacin...

Atrioventricular junctional rhythm: classification and clinical significance.

Acceleration of Sinus Rhythm During Slow-rate

We evaluated the effects of slow-rate atrial pacing on impulse formation of the sinus node in 13 isolated rabbit right atria using the microelectrode technique. After the spread of activation was mapped to determine true sinoatrial conduction time (SACT) (38 ± 16 msec [± SD]), the atrium was paced for eight beats at constant intervals slightly shorter than spontaneous cycle length in steps of 1...

Absence of junctional rhythm during successful slow-pathway ablation in patients with atrioventricular nodal reentrant tachycardia.

BACKGROUND The presence of junctional rhythm has been considered to be a sensitive marker of successful slow-pathway ablation. However, in rare cases, junctional rhythm was absent despite multiple radiofrequency applications delivered over a large area in the Koch's triangle, and successful ablation was achieved in the absence of a junctional rhythm. METHODS AND RESULTS This study included 35...

Accelerated junctional rhythm, isorhythmic atrioventricular dissociation, and hidden P waves.

62-year-old diabetic, hypertensive woman with prior stenting of her dominant right coronary artery underwent coronary arteriography because of an abnormal stress test. A 90% narrowing of the left circumfl ex coronary artery beyond the second obtuse marginal branch was stented with a 3 × 18-mm drug-eluting stent. She went to the recovery room in good condition, and an electrocardiogram was recor...