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At least 487 records · Page 27Linked to original sources
PubMed1987

Doppler ultrasound in the prediction of transvalvar pressure gradients in patients with valvar pulmonary stenosis.

Good correlation between Doppler-derived and catheterization-measured pulmonary valvar pressure gradients has previously been reported. The purpose of this paper was to present two groups of patients who did not show such correlation, namely those with very severe stenosis and those measured immediately following balloon pulmonary valvoplasty. Twenty-two patients, aged 4 months to 20 years, in whom Doppler and catheterization pressure gradients were measured within 24 hours of each other were included in the study. There were 35 pairs of such data. The correlation coefficient for the entire group was 0.61 which improved to 0.91 when the five patients with severe stenosis (gradients of 94 to 190 mm Hg) and one patient with severe right ventricular infundibular stenosis immediately following balloon valvoplasty were excluded from analysis. Although the possibility exists, technical aspects of Doppler recording did not appear to be causing this lack of correlation. Cone-shaped spray formation rather than a focused jet in patients with extremely severe pulmonary stenosis may be postulated to be responsible for poor prediction by Doppler of catheterization gradient. Once these two groups of patients are excluded, there is excellent correlation between Doppler and catheterization gradients in patients with pulmonic stenosis.

Adolescent↗
PubMed1981

[Diagnosis of a complete atrioventricular canal with infundibular pulmonary stenosis and left superior vena cava by 2-dimensional contrast echocardiography. Apropos of a surgically treated case].

The case of an eight year old child with complete atrioventricular canal, pulmonary infundibular stenosis and persistent left superior vena cava draining into the coronary sinus is reported. Two-dimensional echocardiography with injection of contrast in a left arm vein gave a precise and complete diagnosis of the malformations before catheterisation and angiography. The complete atrioventricular canal was demonstrated by apical four-chamber views. The pulmonary infundibular stenosis was visualised by a short axis subcostal view. Contrast echocardiography in the apical four-chamber view showed a right-to-left shunt at atrial level at the site of the ostium primum and a right-to-left shunt at ventricular level just below the hemivalve. The left superior vena cava was detected by a short axis suprasternal view which visualised its vertical trajectory as far as the coronary sinus. The lesions were confirmed at surgery, and a complete repair was performed.

Atrioventricular Node↗