Atrial Septal Defect (ASD) ECG Review
When an ostium primum atrial defect is present, the ECG reveals left axis deviation. When an ostium secundum atrial septal defect is present, the ECG reveals right axis deviation.
1. Chou’s Electrocardiography in Clinical Practice: Adult and Pediatric, Sixth Edition, Saunders, Philadelphia, 2008.
2. Surawicz B, et al. AHA/ACCF/HRS Recommendations for the Standardization and Interpretation of the Electrocardiogram. Circulation. 2009; doi:10.1161/CIRCULATIONAHA.108.191095.