Dextro-transposition of the great arteries electrocardiogram

Dextro-transposition of the great arteries Microchapters
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Pre-natal dextro-transposition of the great arteries
Post-natal dextro-transposition of the great arteries
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-In-Chief: Priyamvada Singh, M.B.B.S. [2]; Cafer Zorkun, M.D., Ph.D. [3]; Keri Shafer, M.D. [4]; Assistant Editor(s)-In-Chief: Kristin Feeney, B.S. [5]

Overview

The ECG may be normal in the newborn , but in older patients there may be changes suggestive of right axis deviation and right ventricular hypertrophy.

Electrocardiogram

• Ocasionally,the ECG is normal in the newborn , but in older patients there is RAD and RVH.
• After a Mustard operation there are bradyarrhythmias.
• The right axis deviation is moderate or absent, in patients with a large VSD, low pulmonary vascular resistance, and LV volume overload.
• The right axis deviation is greater if there is a reduced pulmonary arterial blood flow and reduced left ventricular volume as a result of pulmonary vascular disease or pulmonic stenosis.