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Abstracts |

Pulmonary Stenosis and the Electrocardiographic Diastolic Overloading Pattern.

John H. Edmonds, M.D.; C. Glenn Sawyer, M.D., F.A.C.P.; Henry S. Miller, M.D.; and Robert C. McKone, M.D.
Ann Intern Med. 1964;60(4):713. doi:10.7326/0003-4819-60-4-713_1
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In 60 to 90 per cent of patients with ostium secundum defects lead V1 of the electrocardiogram has an rSR′ pattern that is thought to be a reflection of "diastolic overloading" of the right ventricle. However, rSR′ patterns in V1 have been reported in 10 to 12 per cent of patients with isolated pulmonary stenosis with no evidence of diastolic overloading. This suggests that flow per se is not the sole determining factor of the QRS configuration in V1 in these two defects. This has been alluded to by Nadas and other authors.

Forty-six patients with isolated pulmonary stenosis were


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