PubMed Health⌕ Search

SEARCH · PubMed Health

Results for “PULMONARY VALVE STENOSIS”

Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 883 records · Page 49Linked to original sources
PubMed1984

Noninvasive quantification of stenotic semilunar valve areas by Doppler echocardiography.

Fourteen patients, aged 1 month to 13 years, with congenital semilunar valve stenosis (11 pulmonary and 3 aortic) were studied for orifice area quantification calculated from a Doppler echocardiographic equation: Area = SV/0.88 X V2 X VET, where SV = stroke volume, V2 = maximal velocity and VET = ventricular ejection time. Results from individual measurements used in this formula and derived area were compared with individual results from cardiac catheterization and valve area derived from the Gorlin formula. Ventricular ejection time by cardiac catheterization ranged from 0.17 to 0.44 second (mean +/- standard deviation [SD] 0.27 +/- 0.09), and by Doppler study from 0.20 to 0.41 second (mean +/- SD 0.29 +/- 0.06) (r = 0.65, standard error of the estimate [SEE] = 0.03, y = 0.149 + 0.528x). Pressure gradient by catheterization ranged from 30 to 125 mm Hg (mean +/- SD 56.6 +/- 33.1), and by Doppler study from 17.6 to 100 mm Hg (mean +/- SD 46.8 +/- 27.9) (r = 0.91, SEE = 8.8, y = 1.23 + 0.904x). Stroke volume was measured by Doppler study simultaneously with cardiac catheterization in nine patients; results at cardiac catheterization with thermodilution measurements (cardiac output/heart rate) ranged from 5.5 to 53.4 cc (mean +/- SD 24.7 +/- 20), and by Doppler study from 5.8 to 46.9 cc (mean +/- SD 23 +/- 18) (r = 0.96, SEE = 3.5). Area quantification was performed in two ways. In Group 1, heart rate-matched stroke volumes from cardiac catheterization were used in the derived equation for Doppler study (all patients). In Group 2, the stroke volume used was that obtained by Doppler study, which was performed simultaneously with cardiac catheterization (nine patients).(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗
PubMed1989

Balloon pulmonary valvuloplasty: a review.

Balloon pulmonary valvuloplasty has been used successfully over the last few years for the relief of moderate to severe valvar pulmonic stenosis in neonates, infants, children, and adults. Both immediate and intermediate term follow-up results have been well documented by cardiac catheterization studies. Electrocardiographic and echo-Doppler evaluation at follow-up is reflective of the results and may avoid the need for recatheterization. The results of balloon valvuloplasty are either comparable to or better than those reported with surgical valvuloplasty. The causes of restenosis have been identified, and appropriate modifications in the technique, particularly the recommended use of a balloon/annulus ratio of 1.2 to 1.5, should give better results than previously documented. Complications of the procedure have been minimal. Further refinement of the catheters and technique may reduce the complication rate even further. The indications for balloon valvuloplasty have not been clearly defined but should probably be similar to those used for surgical valvotomy; only patients with moderate to severe valvar pulmonic stenosis are candidates for balloon valvuloplasty. Previous surgery and pulmonary valve dysplasia are not contraindications for balloon valvuloplasty. The procedure is also applicable to pulmonary stenosis associated with other complex cardiac defects and stenosis of bioprosthetic valves in pulmonary position. Miniaturatization of balloon/catheter systems to further reduce the complication rate and documentation of favorable result at 5- to 10-year follow-up are necessary.

Catheterization↗
PubMed1990

[A surgically treated case of partial anomalous pulmonary venous connection to the right atrium, diagnosed by magnetic resonance imaging].

We report a successful surgical repair of a 33-year-old male with partial anomalous pulmonary venous connection (PAPVC) to the right atrium and pulmonary valve stenosis. This case was diagnosed using Magnetic Resonance Imaging (MRI). The findings of MRI clearly showed an abnormal development of the atrial septum far to the left, and the right lower pulmonary vein connected to the right atrium. An embryologic explanation of PAPVC can be provided in many cases by persistent communication between pulmonary veins and systemic veins. However, the MRI findings of this case support the suggestion of Neill that an abnormal development of the atrial septum far to the left provides an embryologic explanation for PAPVC to the right atrium. Preoperative MRI study of PAPVC to the right atrium prove to be of great value in preventing accidental over-cutting of the posterior atrial wall during surgical correction.

Adult↗