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At least 937 records · Page 52Linked to original sources
PubMed1990

Percutaneous double-balloon valvuloplasty of porcine bioprosthetic valves in the tricuspid position.

This is a description of the first two reported cases of double-balloon valvuloplasty in the treatment of porcine bioprosthetic valve stenosis in the tricuspid position. In both cases, the double-balloon technique resulted in a better hemodynamic improvement than single-balloon valvuloplasty and was well tolerated. Double-balloon valvuloplasty is a reasonable alternative to surgical replacement of a stenotic bioprosthesis in the tricuspid position.

Adult↗
PubMed2001

Unusual echocardiographic views of bicuspid and tricuspid pulmonic valves.

The pulmonary artery is typically seen on transthoracic echocardiography in its longitudinal axis. Therefore, short axis views of the pulmonic valve leaflets are not generally obtained, and the distinction between tricuspid and bicuspid pulmonic valves is difficult or impossible. Bicuspid pulmonic valve is one cause of pulmonic stenosis, which is especially common in tetralogy of Fallot. Presented here are 2 patients in whom the orientation of the pulmonary artery was unusual, and the pulmonic valve was seen en face. The first patient had tetralogy of Fallot and a bicuspid pulmonic valve. The severe obstruction to right ventricular outflow was infundibular. The second patient had severe stenosis of a tricuspid pulmonic valve, which was treated with balloon valvuloplasty. These unusual views of the pulmonic valve leaflets were obtained because of anterior displacement of the pulmonary artery, and precise anatomic delineation of the problem in each case was possible with transthoracic echocardiography.

Adult↗
PubMed1972

Alterations in the baroreceptor reflex in conscious dogs with heart failure.

The effectiveness of the baroreceptor reflex in conscious dogs with experimental cardiac hypertrophy and heart failure was compared with that in a group of normal conscious dogs. Cardiac hypertrophy and heart failure were produced by tricuspid avulsion and progressive pulmonary stenosis. The sensitivity of the baroreceptor reflex to transient hypertension was assessed by determining the slope of the regression line relating the prolongation of the R-R interval to the rise in systolic arterial pressure during the transient elevation of arterial pressure induced by an intravenous injection of 1-phenylephrine. The mean slope averaged 22.4+/-2.3 msec/nm Hg in 16 normal animals. 23.1 +/-1.5 in five sham-operated animals, and was significantly reduced to 8.3 +/-0.8 in 10 dogs with hypertrophy alone (P < 0.001), and to 3.3+/-0.5 in nine dogs with heart failure (P < 0.001). The response to baroreceptor hypotension was compared during bilateral carotid artery occlusion (BCO) in six normal and six heart failure dogs previously instrumented with Doppler flow transducers on the superior mesenteric and renal arteries. During BCO, in normal dogs arterial pressure increased 52+/-4 mm Hg, heart rate 33+/-2 beats/min, mesenteric resistance 0.17+/-0.03 mm Hg/ml per min, and renal resistance 0.37+/-0.10 mm Hg/ml per min. In the heart failure group all of these variables increased significantly less (P < 0.01); arterial pressure rose 25 +/-3 mm Hg, heart rate 13 +/-4 beats/min, mesenteric resistance 0.04+/-0.007 mm Hg/ml per min, and renal resistance 0.18+/-0.09 mm Hg/ml per min.Thus, in heart failure, all measured systemic and regional circulatory adjustments consequent to baroreceptor hypo- and hypertension are markedly attenuated. This study demonstrates a profound derangement of a major cardiovascular control mechanism in experimental heart failure.

Animals↗
PubMed1998

[A case of aortic prosthetic valve endocarditis with aortic root aneurysm].

A 72-year-old male who underwent patch closure of atrial septal defect and aortic valve replacement (AVR) 10 years ago was diagnosed as aortic prosthetic valve endocarditis for recurrent fever, coexisting paravalvular leakage and aortic root aneurysm by transthoracic and transesophageal echocardiography. Operative findings showed mechanical prosthesis was dehiscenced in part and limited subannular aneurysm that was healed macroscopically. The hole of the aneurysm was closed by direct suture. Re-AVR, mitral valve replacement and tricuspid annuloplasty for complicating mitral valve stenosis and regurgitation and tricuspid valve regurgitation was performed. The patient is now doing well for one year after the reoperation.

Aged↗
PubMed1995

Paradoxical embolism in the presence of right-to-left shunt due to tricuspid occlusion.

The case of a 33-year-old woman suffering from a paradoxical peripheral embolism in the presence of a right-to-left shunt at the level of an ostium secundum defect is presented. A functional stenosis of the tricuspid valve due to obstruction through a thrombotic atrial mass was found to be responsible for the right-to-left shunt. Treatment consisted of peripheral embolectomy, removal of the atrial mass, and closure of the atrial septum defect.

Adult↗