Non-invasive recording of His bundle potential in man. Simplified method.

Left ventricular approach for recording His bundle potential in man.

The electrical potentials of the His bundle (HB) were recorded from the left ventricular endocardial surface in 28 patients ranging from 16 to 63 years of age. In 14 of the patients the left bundle branch (LB) potentials were also obtained. Placement of a bipolar electrode catheter tip toward the interventricular septum, right at and also 1 to 2 cm below the aortic valve, resulted in stable rec...

Catheter technique for recording His bundle activity in man.

A technique for the routine recording of His bundle (H) activity in man using a bipolar or multipolar catheter is described. The recording catheter is inserted percutaneously, via the Seldinger method, into the right femoral vein and advanced fluoroscopically into the right atrium. Placement of the pre-formed curve at the catheter tip across the tricuspid valve in nine patients resulted in stab...

Effect of phentolamine on atrioventricular conduction in man assessed by recording His bundle potential.

The effect of phentolamine on atrioventricular conduction was studied in 6 patients using the technique of recording the His bundle potential. Right atrial pacing was used in order to keep the heart rate constant before and after administration of the drug. Increasing the heart rate by right atrial pacing resulted in a progressive increase in the PH interval, which represents atrial and atriove...

Intraoperative recording of the His bundle electrogram in man. An assessment of its precision.

To estimate the effect of distance between the electrode and the signal source on the amplitude of the His bundle electrogram (HBE) recorded during open heart surgery, a specially designed probe, containing six pairs of closely spaced (1 mm) electrodes was placed on the endocardial surface of the right atrium such that each electrode pair was parallel to the course of the His bundle. The amplit...

Antegrade concealed conduction to the His bundle; documentation with His bundle recording.