Search PubMed⌕ Search

Biomedical subjects

A Riberi

Publications and source records attributed to A Riberi.

30 records · Page 2Linked to original sources
PubMed1994

Thallium perfusion and myocardial hypertrophy in transplanted heart recipients with normal or near-normal coronary arteriograms.

In patients with hypertrophic cardiomyopathy or systemic hypertension, exercise thallium perfusion defects have been observed but without significant angiographic stenoses. Hypertension and myocardial hypertrophy are common in transplanted heart recipients, and the aim of this study was to determine if exercise thallium scintigraphy false-positives are frequent in transplanted heart recipients. Thirty-four transplanted heart recipients were evaluated by exercise thallium single emission computed tomography and subsequently had a normal or near normal coronary arteriogram. At the time of the exercise, the patients (28 men and six women) had a mean age of 48.9 +/- 12 years and 29 had been previously treated for systemic hypertension. The mean duration between transplantation and the exercise test was 31.6 +/- 13 months. In all patients left ventricular mass was obtained by echocardiography within 3 months of thallium 201 SPECT and was > or = 130 g.m-2 in nine males and > or = 110 g.m-2 in four females. M-mode septal + posterior end-diastolic thickness was > 23 mm in 14 patients, all of whom had been previously treated for systemic hypertension. These patients were older and endured a longer period during which the heart was kept cold but ischaemic before being grafted ('cold ischaemia') but a shorter exercise duration than patients without left ventricular hypertrophy. During exercise testing, 26 of 34 patients achieved at least 80% of their maximal predicted heart rate and two developed significant ECG changes.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1992

A simple approach to takedown of a modified Blalock shunt.

We describe a simple and rapid technique for takedown of right-sided modified Blalock shunts involving a blunt approach between the pericardium and the pleura. We have used this method successfully on either side in 47 cases.

Arteriovenous Shunt, Surgical↗
PubMed1992

Delayed traumatic superior mesenteric arteriovenous fistula after a stab wound: case report.

Eight cases of superior mesenteric arteriovenous fistula (SMAVF) occurring after an abdominal stab wound have been reported. Seven of these patients manifested symptoms within 1 month after the stab wound. We report the case of a 28-year-old man whose SMAVF occurred 31 months after an abdominal stab wound. A SMAVF must be considered even when considerable time has elapsed between penetrating abdominal trauma and symptoms of abdominal pain, unexplained diarrhea, or an abdominal bruit or thrill.

Abdominal Injuries↗
PubMed1992

Evaluation of an absorbable suture for sternal closure in pediatric cardiac surgery.

We conducted a study in a prospective fashion using 1-mm diameter absorbable sutures (polydioxanone [PDS]) for sternal closure in 50 consecutive patients, ages 5 months to 16 years, weighing 5 to 27 kg. Good wound closure and absence of any iatrogenic complications were noted. Potential benefits of this approach include disappearance of sequelae of the closure and better bone healing. This appears to be a safe alternative to standard sternotomy closure.

Child↗
PubMed1992

[Establishment of a bank of cryopreserved valve homografts and clinical use in ninety-two patients].

Good long-term results obtained with homologous valve grafts, specially for correction of congenital cardiac defects, prompted us to create a local cryopreserved homograft bank. A 5-year experience is described, including indications for harvesting, techniques of preparation, cryopreservation and thawing. During this period, 195 homografts entered the bank and 92 were used. Among these 92 clinical cases, 74 consisted of right ventricular outflow tract reconstruction (47 valved conduit and 27 monocusp bearing patch) and 17 were left ventricular outflow tract reconstructions (11 free hand aortic valve and 6 aortic root replacement). Only one case was a tricuspid replacement with a stented homograft. Short-term results, with these homografts, are satisfactory and are compared with long-term results reported in the literature. The authors insist on using very thorough techniques and constant quality control. New developments should include viability control and immunological studies.

Aortic Valve↗
PubMed1992

[Leiomyosarcoma of the inferior vena cava invading into the liver. Complete resection with venous reconstruction].

A case of leiomyosarcoma of the retrohepatic inferior vena cava associated with metastasis in the right liver lobe is reported. Resection included extended right hepatectomy, right nephrectomy, and tumor--containing inferior vena cava resection followed by polytetrafluoroethylene tube reconstruction. A comfortable survival was obtained before multifocal malignant spread led to death 42 months after surgery.

Blood Vessel Prosthesis↗
PubMed1990

[Liver and thyroid gland. Physiopathologic and clinical relationships].

The liver plays a dominant role in the metabolism of the thyroidal hormones; it is here that the 5' deiodase acts to convert part of T4 to T3. There are eight further circulating iodothyronines: the rT3, mainly derived from T4, appears to be the major inhibitor of T4 and T3. Thus, if rT3 increases, the metabolic effects of T3 and T4 can be quite different. In the course of some chronic systemic diseases (e.g. hepatic cirrhosis) rT3 increases simultaneously with the decrease of T3 levels. Therefore we can describe particular alterations of the thyroidal pattern typical of chronic liver diseases: low T3 syndrome, low T3 and T4 syndrome, high T4 syndrome, mixed forms. T3 and T4 diminish due to inefficient hepatic deiodination and defective hepatocellular uptake. Inefficient hepatic deiodination and defective hepatocellular uptake. T4 levels decrease, most likely because of an inefficient production of thyroid binding globulin, or the action of a peripheral binding inhibitor. During acute liver diseases and primitive biliary cirrhosis, we can observe an increase of T4 and TBG together with an increase of the acute phase proteins. Such complex hormonal mechanisms are not influenced by TSH, which appears normal or inhibited, as the TRH stimulus test is normal. The explication can be found in an enhanced conversion of T4 to T3 in the pituitary gland. The biological and clinical significance of these mechanisms might be that of creating a "protective" state for an organism in a catabolic state by reducing the circulating T3. A relationship has been found between circulating thyroidal hormones levels, particularly the T3, rT3 and rT3/T3 ratio, and the state of hepatic functional insufficiency.(ABSTRACT TRUNCATED AT 250 WORDS)

Homeostasis↗
PubMed1985

[Popliteal aneurysms. Our experience apropos of 119 cases].

The authors report their experience of 119 popliteal aneurysms diagnosed in 76 patients. They feel that the prevalence of such aneurysms is underestimated. In 56% of cases there were bilateral aneurysms and in 24% of cases there was an associated aortic aneurysm. In 68% of cases, the popliteal aneurysm presented with complications. Clinical examination of the popliteal fossa gave a diagnosis in 66% of cases. In 1/3 of cases, arteriography failed to provide direct visual evidence of the aneurysm. The arteriographic diagnosis was then that of a femoro-popliteal thrombosis, of stenosis or isolated popliteal thrombosis. In all these difficult cases, echotomography is essential to diagnosis. The authors feel that indications for surgery should be as wide as possible. They consider that there are three types of contraindications: an excessively precarious physical condition, absence of a distal vascular network, an asymptomatic thrombosed popliteal aneurysm.

Adult↗
PubMedDate not supplied

Total parenteral nutrition (TPN) in the critically ill patient.

A study has been carried out on the effectiveness of a total parenteral nutrition (TPN) program on 12 patients in intensive care units (ICU). Conclusions have been drawn from biohumoral parameters during the first fornight's stay in the ICU. Results, relating to the re-equilibrium of the glycid and protydic sectors, varied in respect of their temporal distribution. There was in fact a stabilisation, if only temporary, in the glycemy, in the very first days, while the proteic metabolism figures showed a recovery leading to stabilisation only in the second week.

Adult↗
PubMedDate not supplied

Alpha-fetoprotein and tissue polypeptide antigen in non neoplastic hepatic disorders.

In order to evaluate the behaviour of alpha-fetoprotein (AFP) and Tissue Polypeptide Antigen (TPA) in non neoplastic chronic hepatic diseases 60 patients suffering from chronic hepatitis have been studied, 28 of them with different ethiology cirrhosis, 4 with primary biliary cirrhosis (CBP), 18 with chronic active hepatitis (ECA), 5 with chronic persistent hepatitis (ECP), 3 suffering from alcoholic and 2 drug-induced hepatitis. In each case the diagnosis was biopsy-proved. We have found that TPA clearly shows an increase in about 90% of cirrhosis and in about 50% of ECA. Moreover, the group with non-A, non-B (NANB) cirrhosis and chronic hepatitis has shown a statistically significant correlation between TPA and alanine aminotransferase (ALT). On the other hand, AFP hants' shown statistically significant variations. The reasons of the TPA increase must probably be looked for in the marked sensitivity of this protein to non neoplastic tissues in rapid regeneration, in addition to the sensitivity to neoplastic tissues. Further studies will be carried out to evaluate the usefulness of TPA to tracing possible cytolitic relapses or any resumption of activity in hepatic cirrhosis.

Adult↗