Biomedical subjects

A Alfidja

Publications and source records attributed to A Alfidja.

11 recordsLinked to original sources

PubMed2006

[Long-term MRI follow-up of aortic dissection in 56 patients: therapeutic impact].

PURPOSE: To retrospectively assess the value of MRI in long-term follow-up of aortic dissection (AD) and its impact on therapy. MATERIALS AND METHODS: Comparison of clinical progression and analysis of 215 MRI examinations performed on 56 patients in our center from 1991 to 2002. RESULTS: Twenty-six patients (46%) had AD complications: 14 (54%) were asymptomatic and eight (31%) had subsequent surgical repair (native aorta upstream prosthesis disease in three patients and aneurismal dilatation of false lumen in five cases). Of the eight patients with secondary surgery, five (63%) were clinically asymptomatic. The delay between initial dissection and secondary surgery was less than 5 years in five patients and exceeded 10 years in three cases. The remaining 30 patients (54%) had unmodified radiological findings after a mean follow-up of 3.5 years (6 months to 9 years). CONCLUSION: MRI depicted AD complications in long-term follow-up of sometimes asymptomatic patients, allowing for adaptation of surgical treatment in 26 cases (46%).

Adult↗

PubMed2006

Portal vein stenosis and occlusion stenting after liver transplantation in two adults.

We report two cases of percutaneous transhepatic stenting of the portal vein to treat stenosis and occlusion disclosed 5 and 18 months, respectively, after orthotopic liver transplantation in two adult patients. If long-term patency is satisfactory, this technique should allow long-term management of portal vein stenosis and occlusion without the use of thrombolysis.

Constriction, Pathologic↗

PubMed2005

[Helical CT of abdominal aorta].

The purpose was to illustrate that single or multirow spiral CT angiography has become the main modality for the examination of the abdominal aorta. Our multidisciplinary group investigates weekly 15 abdominal aortas, with a single slice spiral CT since 1995, and a 4 row detector spiral CT since 1999. CT scans protocols and parameters optimization for the 2 CT systems are described. Indications and results of CT to investigate the various abdominal aortic diseases are illustrated and discussed: aneurisms (pretherapeutic staging, selection of indications of endovascular stent-grafting); obstructive aorto-arteriopathies (pretherapeutic staging, follow up after endovascular revascularization); dissection (diagnosis, pretherapeutic staging, follow up); inflammatory diseases; normal patterns and principal complications after surgery. Situations where multislice CT is superior to single slice CT and compared advantages of MRI are discussed. CT is at the present time the main technique to image abdominal aorta. Multislice CT is especially interesting to explore the whole aorta, poly traumatisms, and to plan and follow up endovascular treatments.

Aortic Dissection↗

PubMed2004

[MRI and arrhythmogenic right ventricular dysplasia (ARVD). Retrospective evaluation of 50 patients].

PURPOSE: To retrospectively evaluate the contribution of MRI to the diagnosis of arrhythmogenic right ventricular dysplasia (ARVD). PATIENTS AND METHODS: Thirty two men and 18 women (mean age: 48.7 years) were imaged using gated spin echo scans and short axis cine MR. References were McKenna criteria (gold standard), and also what we called "strong presumption" which may correspond to early or localized patterns, but correspond to negative McKenna scores. RESULTS: One patient was claustrophobic; another one was lost to follow-up. In reference to McKenna score, diagnosis of ARVD was established in 12 patients (2 of whom had familial dilated biventricular cardiomyopathy with rhythmic expression). Sensitivity, specificity, positive predictive value, negative predictive value and prevalence were respectively: 75%, 75%, 50%, 90% and 25%. Using "strong presumption" criteria, we observed 14 true positives (with sensitivity of 82%, specificity of 87%, PPV of 78%, NPV of 90% and prevalence of 35%). CONCLUSION: In our group, MRI was always performed before angiography. In our series, right ventricular wall T1W hyperintensity was the most frequent finding.

Arrhythmogenic Right Ventricular Dysplasia↗

PubMed2004

[Percutaneous treatment of obstructive lesions of the aortic bifurcation: results at 50 months from 28 patients].

OBJECTIVE: We conducted a retrospective analysis of short- and mid-term results of endoluminal treatment of obstruction lesions involving the terminal aorta and the initial portions of the iliac arteries in 28 patients. PATIENTS AND METHODS: Twenty-eight patients (9 women, 19 men, mean age 57.5 Years) presented 52 obstructive atheromatous lesions of the aorto-iliac bifurcation. The lesions were divided into three topographic groups (9 unilateral lesions, 19 bilateral ostial lesions, 5 widespread lesions of the terminal aorta) and identified as simple (44%) or complex (56%, more than 2 cm in length and/or calcified and/or eccentric). RESULTS: Technical success was achieved in 93% of the cases with only one hematoma of the puncture site. Primary and secondary patencies were 78.9% and 93% after a mean follow-up of 50 Months (range 4-85). Clinical outcome remained good at this term for all cases of technical success but complete resolution of the symptoms was more frequent when a stent was used (84%) than for simple balloon dilatation (49%). CONCLUSION: Percutaneous treatment of obstructive lesions of the aorto-iliac bifurcation may be proposed when possible as a first-line treatment.

Angioplasty, Balloon↗

PubMed2004

[Spiral CT in aortic dissection].

Patients with suspected dissection of the thoracic aorta require immediate diagnostic evaluation so that urgent therapeutic interventions can begin. Two women with suspected aortic dissection and one man with abdominal aortic aneurysm underwent color-flow Doppler echocardiography and CT angiography with multiplanar reconstructions. Spiral CT showed ascending aortic dissection (type A Stanford) in two cases and descending aortic dissection (type B Stanford) in one case. It also access the visualization of the intimal flap, the extent of dissection, the size of the aorta, and the presence of pericardial fluid. CT angiography is an accurate diagnostic procedure for patients with suspected aortic dissection and possesses several advantages over other modalities such as transthoracic echocardiography, transesophageal echocardiography and aortography.

Adult↗

PubMed2003

[Commissural agenesis associated with inter hemispheric cyst].

The Objectives of this study were to Report a rare malformation and to try to understand the embryological origin of such lesion. We reported the case of an eight-month-old female infant, without any particular past medical history, who was refered for seizures and vomiting. The examination revealed normal anthropometric constants, a soft painless and renitent tumefaction of the vertex and a psychomotor delay. Skull x-ray showed a parietal lacuna opposite to an opacity. Ultrasound scan showed an encephalocystocele communicating with dilated ventricles. CT x-ray revealed a single ventricle with an important back and upper extension, which evokes a cystic formation of the centre line. The existence of this cystic formation suppose an agenesis of diencephalic and telencephalic structures notably commissural. Interest of such observation is in its rarity, its complexity, the possibility of its antenatal diagnosis and in the etiopathogenic discussions that she gives rise to.

Agenesis of Corpus Callosum↗

PubMed2002

[Arachnoid cyst with orbital meningocele: a case report].

Arachnoïd cysts are rare. 1% of cranial neoformation. We report the case of a six years old boy who presented an arachnoid cyst impressive by its compressive phenomena. Present complaint are macrocrania and right orbitary tumor. Tomodensitometry reveal a huge liquid collection which starts from the right cerebellopontine angle to the frontal region and invading the orbital cavity. In addition we have a thalamic fusion Its congenital origin is obvious. The associated malformations seem to be related to an anomaly of the centre line. This case point out the primum movens of malformations which are often complex and whose antenatal diagnosis is rare in our countries

Arachnoid Cysts↗

PubMed2001

Identification of human enterovirulent Escherichia coli strains by multiplex PCR.

Some strains of Escherichia coli are involved in enteric infections in both adults and children. However the classical diagnostic methods can not differentiate pathogenic from nonpathogenic E. coli, because of the lack of phenotypic differences. In this study, we developed multiplex PCR in order to amplify fragments of specific virulence genes of the five main E. coli pathotypes. Fragments of the expected size were obtained using previously or newly designed primers and allowed identification of 10 virulence genes in only 5 reactions. This method was applied to the detection of pathogenic E. coli isolated from 90 patients' stools specimens during an 18-month survey. Patients were suffering from diarrhea or hemolytic uremic syndrome and in 13 cases (14.4%), an enterovirulent E. coli strain was detected. This diagnostic method could therefore represent an important technique in clinical laboratories which lack standard tests for these pathogens.

Adolescent↗

PubMed1997

Cure of renovascular hypertension by percutaneous occlusion of a large idiopathic renal arteriovenous fistula. Case report.

Percutaneous balloon occlusion of a large hypertensive idiopathic renal arteriovenous fistula is reported. A lumbar thrill was noted in a 52-year-old hypertensive woman. Intravenous digital substraction angiography identified the lesion. After arteriographic assessment a percutaneous embolisation was performed with a releasable balloon positioned on a coaxial micro-catheter. Immediate post-procedural angiographic control demonstrated complete occlusion with a small segmental area of renal hypoperfusion. The lumbar thrill disappeared. Normalisation of the blood pressure was noted two days later and confirmed eight months later. Persistent occlusion of the fistula was angiographically confirmed, whereas the area of renal hypoperfusion had partially decreased. Releasable balloon percutaneous embolisation appears to be a safe alternative to surgery in the treatment of large renal arteriovenous fistulas.

Angiography, Digital Subtraction↗

PubMed1997

[Contribution of mammography and echography to the diagnosis of breast cancer in Dakar: apropos of 25 cases].

The authors studied mammographic features of 25 patients with malignant breast disease. 24 of them had ultrasonographic (US) exploration. The study appreciates epidemiological, mammographic and US aspects; It also appreciates the correlation between images and histology. The mean age is 40. Six women (26%) had family history cancer. The mean reason of the exploration is a mass in 76%. At mammography, contours of cancerous opacities are irregular in 56%, regular in 16%. In 20%, the cancer showed no opacity. At US, we find a lack that appears irregular in 48%, regular in 24%, without traduction in 4%, non precised in 24%. Mammography sensitivity was 80%, false negative rate 28% and false positive rate 8% against respectively 96%, 32% et 12% for echography. This study shows that US is more sensitive but less specific than mammography. However, we recommend the use of mammography and echography together because in Senegal, cancer happens at an earlier age at with breast is easier to analyze at US.

Adult↗