Cyanotic heart defect electrocardiogram: Difference between revisions
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==Overview== | ==Overview== | ||
Latest revision as of 22:02, 18 October 2012
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] : Associate Editor(s)-in-Chief: Kalsang Dolma, M.B.B.S.[2]
Overview
Electrocardiogram
The normal neonatal electrocardiogram (ECG) has right axis deviation (QRS axis +90 to +180 degrees) and a precordial pattern of right ventricular hypertrophy.
- Lesions associated with a small right ventricle have the following:
- Left axis deviation for age (for pulmonary atresia intact ventricular septum typically +30 to +90 degrees; for tricuspid atresia with normally related great arteries typically -30 to -90 degrees)
- Right atrial enlargement – Tall peaked P waves most easily identified in lead II
- Left ventricular hypertrophy
- Hypoplastic left heart syndrome often has marked right ventricular hypertrophy and decreased left ventricular forces in the lateral precordial leads.
- Ebstein's anomaly has signs of right atrial enlargement or tall and broad 'Himalayan' P waves.