His bundle electrogram in congenitally corrected transposition of the great vessels

Area of Science:

• Cardiology
• Electrophysiology
• Congenital Heart Disease

Background:

• Corrected transposition of the great vessels and single ventricle are complex congenital heart defects.
• Cardiac conduction abnormalities can complicate congenital heart disease management.
• Electrophysiological studies are crucial for assessing cardiac conduction.

Purpose of the Study:

• To investigate cardiac conduction patterns in a young adult with corrected transposition of the great vessels and single ventricle.
• To identify specific regions of conduction delay using His bundle electrogram.

Main Methods:

• His bundle electrogram recording was performed in a young adult male patient.
• Analysis of electrophysiological intervals including PA, AH, and HV intervals.
• Evaluation of His spike morphology.

Main Results:

• Prolonged PA and AH intervals were observed.
• A wide, diphasic His spike was noted.
• Normal HV intervals were recorded.

Conclusions:

• The findings suggest a diffuse conduction delay involving intra-atrial, atrioventricular nodal, and intra-His regions.
• These delays are characteristic of the complex electrical sequelae in corrected transposition of the great vessels with a single ventricle.
• His bundle electrogram provides valuable insights into complex congenital heart disease electrophysiology.