Biomedical subjects

M Idir

Publications and source records attributed to M Idir.

6 recordsLinked to original sources

PubMed2002

Electromagnetic-field distribution measurements in the soft x-ray range: full characterization of a soft x-ray laser beam.

We report direct measurement of the electromagnetic-field spatial distribution in a neonlike Ar capillary discharge-driven soft x-ray laser beam. The wave front was fully characterized in a single shot using a Shack-Hartmann diffractive optics sensor. The wave front was observed to be dependent on the discharge pressure and capillary length, as a result of beam refraction variations in the capillary plasma. The results predict approximately 70% of the laser beam energy can be focused into an area 4 times the size of the diffraction-limited spot, reaching intensities of approximately 4 x 10(13) W/cm(2).

Journal Article↗

PubMed2002

[Value of eptifibatide during salvage angioplasty with coronary stenting after failure of thrombolysis. Report of a series of 41 patients].

AIM: To evaluate the risks and the significance of the use of an anti-GPIIb/IIIa, in this case Eptifibatide, during angioplasty following presumed failure of thrombolysis in the acute phase of myocardial infarction. METHOD: Patients thrombolyzed following MI < 6 hours. Presumed failure of reperfusion with full dose thrombolysis. Analysis evaluated the success of angioplasty associated with anti-GPIIb/IIIa treatment and the hospital phase outcome. RESULTS: 41 consecutive patients, 32 male (78%) and 9 female (22%), were included. Infarction concerned the anterior region in 22 cases (54%) and inferior in 19 cases (46%). Fibrinolysis was performed using Alteplase in 28 patients (68%) and Reteplase in 13 patients (32%). Radial access was performed in 32 cases (78%). All of the patients received Eptifibatide with a bolus then infusion from their admission to the haemodynamic suite, on average 1 h 30 after the start of thrombolytic treatment. A total of 49 stents were implanted in 41 patients. A flux of TIMI 3 was obtained in 37 patients (90.2%). TIMI 2 in 2 patients (4.9%) and no reflow in 2 patients (4.9%). Four counter-pulsions by intra-aortic balloon were necessary (9.8%) for cardiogenic shock. No decrease in TIMI flux was observed after the angioplasty procedure. The main complications were a death from cardiogenic shock in one patients (2.4%), a non-fatal digestive tract haemorrhage in 2 cases (4.9%) and a single femoral haematoma requiring transfusion. CONCLUSION: The initial results were encouraging: high success rates, rare vascular complications, a probable consequence of the radial approach. The association of an anti-GPIIb/IIIa, Eptifibatide, therefore appears achievable during angioplasty with the positioning of a coronary endoprosthesis following the presumed failure of full dose thrombolysis.

Adult↗

PubMed2000

Endarteritis and false aneurysm complicating aortic coarctation.

We report a tricky case of endocarditis because of the localization, aortic coarctation, and the pathogenic bacteria Actinobacillus actinomycetemcomitans. Furthermore, we underline the leading role of transesophageal echocardiography in the diagnosis of aortic endarteritis. First, aortitis was treated with antibiotics and, second, successfully operated on.

Actinobacillus Infections↗

PubMed2000

Fragmentation of a right atrial myxoma presenting as a pulmonary embolism.

We report here a tricky case of right atrial myxoma with a pulmonary localization mimicking pulmonary thromboembolism. The diagnosis on imaging investigation was delayed because of its atypical appearance. This case report emphasizes the leading role of transthoracic and transesophageal echocardiography in the management of this condition. In autopsy series, the incidence of primary tumors of the heart is evaluated at 0.0017% to 0.19%.(1) Nearly half of them are myxoma.(1, 2) Myxoma are more frequently observed in adults and are commonly localized in the left atrium. Signs and symptoms are comparable to those arising in other cardiovascular and systemic conditions, including variable cardiac murmur, uneasiness, blackout, systemic embolism, cardiac insufficiency, lasting fever, or sudden death.(3) Rare cases of pulmonary embolism have been described. We report here an atypical case of right atrial myxoma with a pulmonary localization mimicking pulmonary embolus.

Adult↗

PubMed2000

Delayed left atrial wall dissection after mitral valve replacement.

We report two unusual cases of left atrial wall dissection creating a left atrial pseudoaneurysm associated with regurgitation a few months after mitral valve replacement. We emphasize the important role of transesophageal echocardiography in the diagnosis. The two patients successfully underwent surgery.

Adult↗

PubMed1999

Collapse and massive pulmonary edema secondary to thrombosis of a mitral mechanical heart valve prosthesis during low-molecular weight heparin therapy.

Mechanical heart valves (MHV) are particularly exposed to thrombosis if anticoagulation becomes ineffective. Thromboembolic complications may be avoided by oral anticoagulation with vitamin K antagonists or derivatives of unfractionated heparin. A few cases of low-molecular weight heparin (LMWH) as sole anticoagulant in patients with MHV have been published, though with contradictory results. We report a case of a massive thrombosis of a St. Jude Medical mitral valve after the patient had been treated for one month with calcium nadroparin (Fraxiparine).

Aged↗