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Biomedical subjects

J L Pomar

Publications and source records attributed to J L Pomar.

67 records · Page 4Linked to original sources
PubMedDate not supplied

Traumatic tricuspid regurgitation.

Tricuspid valvular insufficiency caused by blunt thoracic trauma may be clinically silent and imprecise. Diagnosis is often done by cardiac catheterization and two-dimensional echocardiography (2-DE); the latter may show abnormalities of the tricuspid leaflet motion. The surgical technique for its correction is still controversial. We report here the case of an eighteen year old man who was involved in a high-speed motorcycle accident. Seven months later, due to dyspnoea and fatigue, 2D-E examination revealed cardiac enlargement and severe tricuspid regurgitation. Surgery was indicated in order to repair valve incompetence. Reinsertion of the chordae tendineae at the anterolateral papillary muscle and annuloplasty was performed and ten months postoperatively, he is in good clinical condition and 2D-E control shows a trivial residual tricuspid insufficiency.

Adolescent↗
PubMedDate not supplied

[Use of a new inotropic agent, enoximone, in heart surgery].

We report our experience with the use of enoximone in 5 patients with severely depressed preoperative myocardial function who underwent cardiac surgery. In patients 1 and 2, enoximone was administered as the inotropic of choice before cardiopulmonary bypass (CPB) and a substantial improvement of cardiac index was achieved; in these patients, enoximone administration after CPB permitted to overcome low cardiac output which persisted after high dose dobutamine in patient 1, and in patient 2 right ventricular contractility improved. In patient 3 the use of enoximone permitted the discontinuation of CPB, which had not been previously possible with the association of dopamine and dobutamine. In this patient, adrenaline perfusion improved the low cardiac output syndrome but resulted in poorly tolerated side effects. However, in patient 4 the administration of enoximone during pre-CPB did not improve in a reduction in filling pressures without an increase in the cardiac index because the patient was hypovolemic. In patient 5, the administration of enoximone permitted to interrupt the infusion of dobutamine and to reduce the dose of sodium nitroprusside, which had resulted in significant tachycardia, with increased myocardial contractility and a reduction of vascular peripheral and pulmonary resistances. We conclude that enoximone, single or in association with other inotropics, should be considered a drug of choice in patients undergoing cardiac surgery who develop a low cardiac output syndrome.

Adrenergic beta-Agonists↗
PubMedDate not supplied

[Aortic valve replacement by a pulmonary homograft].

Minor experience still exists in our country with regard to the use of valve homografts in cardiac surgery. Only a few implantations have been performed in cases of right ventricular outflow tract reconstruction in addition to our own experience in cases of infective endocarditis of the aortic valve. We present a case of aortic valve replacement by using an antibiotic-sterilized fresh pulmonary valve autograft. The case is described and the possible advantages of the use of pulmonary allografts in the aortic position are discussed.

Adult↗
PubMedDate not supplied

[Accidental opening of a Greenfield filter at the right atrium].

A case of patient with an accidental aperture of a Greenfield filter through the right auricula during the surgical procedure performed in order to insert the mentioned filter is presented. This filter had to be removed under extracorporeal circulation, and it was immediately followed by the placement of a clip in the inferior vena cava. Complications associated to the Greenfield filter and adequate approach to this rare event are commented.

Adult↗
PubMedDate not supplied

Dysfunction of a Duromedics valve in the tricuspid position. Case report.

Tricuspid dysfunction appeared in a 47 year-old woman fifteen months after multiple valvular surgery, including aortic and tricuspid valvular replacement with Duromedics valves. At reoperation one of the leaflets of the tricuspid prosthesis was blocked with overgrown tissue from the native tricuspid annulus. The prosthesis was replaced with another Duromedics valve and the patient is doing well nineteen months later. This case, is the first report of dysfunction of a Duromedics mechanical cardiac valve inserted in the tricuspid position.

Female↗
PubMedDate not supplied

Complete translocation of the aortic root and coronary bypass grafting with a microporous polyurethane (Mitrathane) composite valved graft in the treatment of recurrent prosthetic valve endocarditis.

The case of a 20-year-old male patient, with a history of addiction to parenteral heroin and recurrent prosthetic valve endocarditis, is presented. In this case the final procedure consisted of a complete translocation of the aortic root and coronary bypass grafting with a composite graft made from a microporous polyurethane (Mitrathane) cardiac patch, a prosthetic valve and two Mitrathane vascular grafts for the coronaries. This is a complex operation, only indicated in cases of extensive destruction of the aortic root due to recurrent endocarditis. To our knowledge, it is the first case of this type performed using Mitrathane.

Adult↗
PubMedDate not supplied

Complications of circulatory assistance with intra-aortic balloon pumping: a comparison of surgical and percutaneous techniques.

One hundred and two consecutive patients who underwent circulatory support with intra-aortic balloon pumping were reviewed. All patients underwent surgery for coronary bypass, resection of ventricular aneurysm, or valve replacement. Circulatory assistance was initiated preoperatively in 21 patients and postoperatively in 81 patients. Insertion of the balloon catheter was attempted randomly by the surgical technique or by the percutaneous method in 47 patients each. The surgical insertion failed in five patients (10.6%), and the percutaneous method was a failure in four patients (8.5%). All failures with both techniques occurred when catheter insertion was attempted postoperatively. Among 85 patients studied for complications, there were 17 vascular and 3 wound complications (23.5%). The complication rate with the surgical technique was 11.4% and that of the percutaneous insertion 30.6%, a difference that is significant. The mean duration of circulatory support was significantly longer in patients who developed vascular complications (123 hours vs 78 hours). Vascular complications resulted in the loss of limb in two patients, one in each group. There were two deaths directly related to the use of circulatory assistance, one from perforation of the iliac artery and one from acute renal failure following revascularization of a severely ischemic limb, both in the percutaneous group. Thus, percutaneous balloon insertion has a failure rate similar to surgical insertion but a higher rate of complications, partly caused by percutaneous removal of the catheter. Practical recommendations are made in regard to the use and management of the technique.

Acute Kidney Injury↗