His Bundle-CRT

His Bundle Refractoriness.

Multiple points of instruction discussed practically in the context of a challenging case make for a memorable learning experience. In this installment of Teaching Rounds in Cardiac Electrophysiology, Nayyar et al elucidate the unique findings and analysis in such a manner and take us through to diagnosis and a treatment plan that eliminated arrhythmia without having to ablate all of the abnorm...

His bundle rhythm.

SUMMARY Traditionally the site of impulse formation in so-called A-V nodal rhythms has been considered to be within the upper, middle, and lower portions of the A-V node. In this study, evidence obtained supports the concept that the His bundle and not the A-V node is the pacemaker site in nodal rhythms. His bundle activity was recorded in clinical cases of nodal rhythms and A-V dissociation by...

His Bundle electrogram in bundle-branch block.

SUMMARY Because a great majority of patients with chronic complete heart block have bilateral bundle-branch lesions, it becomes important to recognize earlier degrees of bilateral bundle-branch block. The H-V interval in the His bundle electrogram during unilateral bundle-branch block reflects the conduction primarily through the contralateral bundle branch, and thus the His bundle electrogram ...

His bundle electrograms.

Since the recording of the first human electrocardiogram by Wailer in I889 the science of electrocardiography has developed and advanced rapidly, but has been limited by the inability to record electrical activity from specialized areas of the heart. A significant contribution was made by Alanis, Gonzailez, and L6pez in 1958 when they recorded His bundle potentials in the isolated perfused dog ...

His bundle tachycardia