Key result
Turner phenotype with normal chromosomes and pulmonary stenosis shows extreme RAD and small V1 R waves.
Observational
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In I968, Noonan reported that the electrocardio- gram in these patients might differ from that usually found in 'pure' pulmonary stenosis, especially with regard to an extreme right axis deviation and an un- usually small R in lead Vi. Similar observations have been made by others (Celermajer, Bowdler, and Cohen, I968; Dupuis et al., I97i). The aim of this report is to document these and other characteristics of the electrocardiogram and vectorcardio- gram in further detail.
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Rasmussen et al. (1973) conducted an observational in Turner phenotype with normal chromosomes (Noonan syndrome) and pulmonary stenosis. Turner phenotype with normal chromosomes and pulmonary stenosis vs. Pure pulmonary stenosis was evaluated on Electrocardiographic and vectorcardiographic characteristics, including extreme right axis deviation and small R wave in lead V1. Turner phenotype with normal chromosomes and pulmonary stenosis is characterized by extreme right axis deviation and an unusually small R wave in lead V1 compared with pure pulmonary stenosis.
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