Cyanotic heart defect electrocardiogram: Difference between revisions
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==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. | |||
==References== | ==References== | ||
Revision as of 19:13, 18 October 2012
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
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.