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Pulmonic Stenosis (pulmonic + stenosis)

Distribution by Scientific Domains

Medical Sciences	100%

Selected Abstracts

ECHO ROUNDS: Percutaneous Balloon Valvuloplasty for Pulmonic Stenosis: The Role of Multimodality Imaging

ECHOCARDIOGRAPHY, Issue 2 2008
Davinder S. Jassal M.D., F.R.C.P.C.
Pulmonic valvular stenosis represents the most frequent cause of right ventricular outflow obstruction. Transthoracic echocardiography is the imaging modality of choice in the diagnosis, evaluation and longitudinal follow-up of individuals with pulmonic stenosis (PS). Although valvular PS is usually diagnosed by two-dimensional imaging, Doppler echocardiography allows for the quantification of severity of the valvular lesion. In patients with limited acoustic windows, computed tomography and cardiac magnetic resonance imaging may provide complementary anatomical characterization of the pulmonic annulus and valve prior to percutaneous balloon valvuloplasty. [source]

Prospective Evaluation of the Balloon-to-Annulus Ratio for Valvuloplasty in the Treatment of Pulmonic Stenosis in the Dog

JOURNAL OF VETERINARY INTERNAL MEDICINE, Issue 4 2006
Amara Estrada
Background: In dogs, treatment of pulmonic valve stenosis (PS) with pulmonary balloon valvuloplasty (PBV) is a viable method to decrease the pressure gradient across the valve. However, to the authors' knowledge, the variables that influence the selection of the correct balloon size for the procedure have not been explored. Moreover, the lesions caused by the procedure have not been detailed. Hypothesis: Variables that influence the measurement of the annulus could affect selection of the balloon size. We sought to determine the effects of treatment when the balloon-to-annulus ratio (BAR) was or > 1.3, but within the recommended range of 1.2,1.5, regardless of whether dilation was performed with single or double balloon technique. Animals: Twenty-five Beagles with PS were studied. Methods: Inter-and intra-observer variability, echocardiography versus angiocardiography, and systolic versus diastolic timing were evaluated for the BAR. Assessment of right ventricular (RV) pressure, Doppler gradient, stenotic valve area, and RV wall thickness were compared before and 1, 90, and 180 days after treatment. Postmortem examination of the heart was done. Results: Significant correlations existed in measurement of the annulus; however, variation existed that would change balloon size. Improvement in the degree of PS was significant regardless of the BAR or single or double ballooning. In the most severely affected dogs, continued improvement was noted on day 90. Postmortem examination revealed tears in the commissures and the valve leaflets. Conclusions: Multiple factors influenced determination of the BAR and a range of 1.2,1.5 was effective without detrimental consequences. Dogs with severe PS had continued decrease in RV pressure 3 months after treatment. [source]

ECHO ROUNDS: Percutaneous Balloon Valvuloplasty for Pulmonic Stenosis: The Role of Multimodality Imaging

Autologous Pericardium Patch Aneurysm after Ventricular Septal Defect Closure and Arterial Switch Operation

JOURNAL OF CARDIAC SURGERY, Issue 4 2009
Fernando A. Atik M.D.
Four months later, the child came back with right ventricular inflow obstruction related to aneurysmal pericardial patch, severe tricuspid regurgitation, and severe supra-valvular pulmonic stenosis. At reoperation, there was a redundant, aneurysmal pericardial patch densely adherent to the septal and posterior leaflets of the tricuspid valve, which was damaged. The pericardial patch was replaced, the pulmonary artery enlarged, and tricuspid valve repaired. Postoperative course was uneventful, but residual moderate tricuspid regurgitation required intensive medical treatment. [source]

Results of balloon valvuloplasty in 40 dogs with pulmonic stenosis

JOURNAL OF SMALL ANIMAL PRACTICE, Issue 3 2004
M. Stafford Johnson
The records of 43 dogs presenting with severe pulmonic stenosis in which balloon valvuloplasty was attempted were reviewed. Thirty-four dogs (79 per cent) were symptomatic at initial presentation. All patients were selected for balloon valvuloplasty on the basis of a Doppler-derived trans-stenotic pressure gradient of over 80 mmHg and concurrent evidence of mild to severe right ventricular hypertrophy. Forty dogs underwent balloon valvuloplasty; the procedure was not performed in three dogs because of an aberrant coronary artery in two cases and because catheterisation of the pulmonary artery was not possible in the third. Overall, 37 out of the 40 dogs (93 per cent) were successfully ballooned, resulting in a mean reduction in the pressure gradient of 46 per cent, with a mean pressure gradient of 124 mmHg on presentation and 67 mmHg six months after the procedure. Three dogs died during balloon valvuloplasty (all of which had a concurrent defect) and three dogs showed a poor clinical response to the procedure. Thus balloon valvuloplasty was successful and resulted in a sustained clinical improvement in 80 per cent of previously symptomatic cases. This study was undertaken to document the results of balloon valvuloplasty in a larger population of dogs than has previously been published. [source]

Use of Auscultation and Doppler Echocardiography in Boxer Puppies to Predict Development of Subaortic or Pulmonary Stenosis

JOURNAL OF VETERINARY INTERNAL MEDICINE, Issue 1 2009
S. Jenni
Background: Boxers are predisposed to subaortic and pulmonic stenosis (SAS, PS). Screening of puppies may be useful in estimating the risk of their developing a defect that potentially compromises life expectancy or exercise tolerance. Hypothesis: Presence of SAS or PS in adult Boxers can be predicted by auscultation and Doppler echocardiography at 9,10 weeks of age. Animals: Eighty-five Boxer puppies examined at 9,10 weeks of age and at 12 months of age. Methods: Prospective, longitudinal observational study. Auscultation by stethoscope and continuous wave-Doppler echocardiography for peak velocities (Vmax) in the aorta (Ao) and pulmonary artery (PA). Results: Intensity of heart murmurs in puppies correlated with VmaxAo and VmaxPA in adults. VmaxAo and VmaxPA in puppies correlated with VmaxAo and VmaxPA in adults, respectively. From puppy to adult, VmaxAo increased and VmaxPA remained unchanged. The negative predictive value for absent or only a soft (,II/VI) murmur in puppies being associated with VmaxAo and PA , 2.4 m/s as an adult was 90% and ,3.5 m/s 100%. The negative predictive value of a Vmax, 2.4 m/s as a puppy still being ,2.4 m/s as an adult was 94% for Ao and 96% for PA, and of a Vmax, 3.5 m/s, 99% for Ao and 100% for PA. Conclusions and Clinical Importance: Even though VmaxAo increases during growth in Boxer puppies, indicating relative narrowing of the aorta, puppies with VmaxAo , 2.4 m/s do not usually progress to clinically have relevant SAS at 12 months of age. [source]

Staged percutaneous atrial septal defect closure and pulmonic balloon valvuloplasty in an adult with congenital heart disease,

CATHETERIZATION AND CARDIOVASCULAR INTERVENTIONS, Issue 3 2008
Jesus A. Vera MD
Abstract Combined atrial septal defect and pulmonic stenosis, while a common occurrence in children, is relatively uncommon in adults. There is no widely accepted order in which the defects should be corrected. We report a case that highlights the hemodynamics and the technical dilemma of deciding which lesion to correct first. © 2008 Wiley-Liss, Inc. [source]