His Bundle Electrograms of Dog

His bundle electrograms of dog. Correlation with intracellular recordings.

Transmembrane potentials from the penetrating and branching portions of the bundle of His were simultaneously recorded along with bipolar extracellular electrograms. Recordings were obtained during periods of normal antegrade and retrograde conduction and also during various degrees of conduction delay and block within and distal to the bundle of His. The onset and ternination of extracellular ...

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 ...

Studies of heart block with His bundle electrograms.

A total of 24 patients with heart block revealed by scalar electrocardiography was studied using the His bundle electrogram. Four groups of disturbed conduction are described which include various types of heart block, partial and complete, at different sites, single and multiple, in the specialized conducting system. These are (i) intra-atrial block with delayed or blocked internodal conductio...

A Balloon Tipped Catheter for Obtaining His Bundle Electrograms Without

A technique for recording His bundle activity in man without fluoroscopic guidance is described. Balloon tipped triOr tetrapolar catheters were designed with pacing electrodes located at the catheter tip, and two fine sensing electrodes 4 and 5 cm behind it. The catheter tip was preformed into a "J" curve. Following percutaneous transfemoral insertion, the catheter is floated to the right ventr...

His bundle electrograms in two cases of Wolff-Parkinson-White (pre-excitation) syndrome.