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Biomedical subjects

L Gonzalez-Lavin

Publications and source records attributed to L Gonzalez-Lavin.

At least 73 records · Page 4Linked to original sources
PubMed1978

Aortic valve replacement during acute rheumatic fever.

Emergency aortic valve replacement was performed during an attack of acute rheumatic fever in a 12-year-old black boy. He had an uneventful recovery and has remained asymptomatic 27 months after operation. In the light of this experience and that of others, one might conclude that the decision to operate on these patients should be based on the severity of the haemodynamic derangement rather than on the state of activity in the rheumatic process.

Acute Disease↗
PubMed1977

Rupture of the normal aortic valve after blunt chest trauma.

Rupture of the normal aortic valve after blunt trauma to the chest is seen infrequently. With the ever-increasing incidence of car and motorcycle accidents, this injury should be considered during the initial examination of an accident victim. Any patient without a history of heart disease presenting with heart murmurs after severe blunt trauma to the chest should give rise to the suspicion of aortic valve damage. When the diagnosis is proved, aortic valve expoloration is necessary. Review of the published cases establishes that valve replacement is the treatment of choice.

Accidents, Traffic↗
PubMed1977

Orthoterminal correction of coexisting d-transposition of the great arteries, subpulmonary stenosis, and a complete form of atrioventricular canal.

This report outlines orthoterminal correction in an 8-year-old boy with coexisting d-transposition of the great arteries (d-TGA), subpulmonary stenosis, and a complete form of atrioventricular canal (CAVC). The repair consisted of covering the tricuspid valve and atrial part of the atrioventricular canal with a Dacron patch and inserting a valve-containing conduit between the then isolated right atrium and the pulmonary artery to create a venous outlet. The patient's exercise tolerance has improved remarkably. The arterial oxygen saturation has risen from 86 to 90 per cent. A plea is made to expand the indications for orthoterminal correction to patients in whom the severity of the heart malformation precludes application of well-established methods of surgical repair.

Child↗
PubMed1976

Successful correction of total anomalous pulmonary venous connection in a 2.5 kilogram premature neonate.

A 16 day old 2.5 kg premature infant with total anomalous pulmonary venous drainage to the coronary sinus was successfully treated with use of profound hypothermia and total circulatory arrest. To the best of our knowledge, this neonate is the smallest to successfully undergo correction of this anomaly. A plea is made for a more aggressive approach in early recognition and assessment of these critically ill infants, followed by early surgical correction.

Age Factors↗
PubMed1976

Degenerative changes in aortic root allografts placed in the right ventricular outflow tract of growing puppies.

Differently prepared aortic root allografts were implanted in the right ventricular outflow tract of growing puppies to determine the site of origin and progress of degenerative changes in these conduits. The three preparations assessed were as follows: group A, fresh and sterile grafts; group B, antibiotic sterilized grafts in nutrient medium; and group C, beta-propiolactone sterilized grafts. Although calcification of the aortic wall occurred in all groups, the aortic leaflets were minimally affected. A correlation between viability and lack of calcification and between viability and long-term function is emphasized.

Animals↗
PubMed1976

Viability assessment of allograft valves by autoradiography.

Autoradiography using [(3)H]thymidine is a quantitative method to assess tissue viability. It has been found to be very useful in the organization of fresh aortic valve allograft banks. A brief description of the technique, as well as the marked difference in the active metabolism of fibro-blasts of valves placed in two storing solutions, is outlined.

Autoradiography↗
PubMed1975

Dacron conduit with a stented porcine xenograft valve in the anatomic correction of transposition of the great arteries and subpulmonary stenosis.

A stented porcine xenograft valve, sutured into a woven Dacron tubular graft, has been used in the anatomic correction of D-loop, D-transposition of the great arteries, and subpulmonary stenosis. The main advantage of this technique is its simplicity and practicality, as both Dacron tubular grafts and stented porcine xenograft valves are commercially available.

Adolescent↗
PubMed1975

Spontaneous closure of paravalvular leak after mitral valve replacement.

Complications after prosthetic valve replacement may be multiple. In biologic valves, valve detachment and cusp perforation may occur. If this is of significant magnitude, reoperation may be required. This report describes recurrent mitral regurgitation after mitral valve replacement with a Hancock porcine xenograft. The regurgitation subsided spontaneously three months later. We felt that a paravalvular leak closed, with progressive fibrosis and tightening of the annulus. Functional results in this patient were excellent.

Adult↗