Transposition of the great vessels electrocardiogram

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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]

Electrocardiogram

• The ECG may be normal in the newborn , but in older patients signs of right ventricular hypertrophy may be seen.

• After a mustard operation rhythm disturbances such as bradyarrhythmias may be seen.

• Varying degrees of AV block may be seen in all patients.

• The right axis deviation is moderate or absent, in patients with a large VSD, low pulmonary vascular resistance, and LV volume overload. On the other hand, the right axis deviation is greater if there is a reduced pulmonary arterial blood flow and reduced LV volume as a result of pulmonary vascular disease or pulmonic stenosis.

• Q waves are present in right precordial leads which resembles inferior wall myocardial infarction.
• Q waves are absent in left Procordial leads.

References

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