The vectorcardiogram in 4 children undergoing the arterial switch repair

Area of Science:

• Pediatric Cardiology
• Congenital Heart Disease
• Cardiac Surgery

Background:

• Complete transposition of the great arteries (TGA) involves discordant ventriculo-arterial connections.
• Delayed arterial switch repair is a surgical option for TGA, sometimes following prior palliative procedures.
• Assessing ventricular readiness for arterial switch repair is critical for surgical success.

Purpose of the Study:

• To evaluate the utility of pre-operative vectorcardiograms in assessing left ventricular preparedness for arterial switch repair in children with TGA.
• To determine if vectorcardiographic parameters correlate with ventricular pressure ratios or surgical survival.

Main Methods:

• Retrospective analysis of 4 children with TGA undergoing arterial switch repair.
• Pre-operative vectorcardiograms were analyzed.
• Cardiac catheterization data was reviewed to assess ventricular pressure ratios.
• Surgical outcomes, including survival, were recorded.

Main Results:

• Vectorcardiograms were performed before arterial switch repair in 4 children.
• Left maximal spatial voltage did not correlate with elevated ventricular pressure ratios or survival.
• All patients exhibited a clockwise horizontal loop on pre-operative vectorcardiograms.

Conclusions:

• Vectorcardiography is not a reliable indicator of left ventricular preparedness for arterial switch repair in this pediatric TGA cohort.
• Further research is needed to identify reliable methods for assessing ventricular suitability prior to arterial switch surgery.