Biomedical subjects

F Marçon

Publications and source records attributed to F Marçon.

77 records · Page 5Linked to original sources

PubMed1982

[Detection and quantification of left-to-right intracardiac shunts by angiocardioscintigraphy].

The ratio of pulmonary/systemic output (QP/QS) was measured by angioscintigraphy in 70 patients from 1 to 22 years of age (average 10 years) admitted to the Department of pediatric cardiology for a left-to-right shunt. Fifty nine of these patients underwent cardiac cathetarisation and QP/QS determination by oxymetry. The correlation between the values of QP/QS calculated by the two techniques was R = 0,83 (p less than 0,001: n = 59); in 28 cases of atrial septal defect R = 0,85; in 20 cases of ventricular septal defect, R = 0,75; in 11 cases of other left-to-right shunts, R = 0,79. No significant shunt was detected in 16 patients by oxymetry and the QP/QS ratio on angioscintigraphy was less than or equal to 1,2 except in 3 cases. In 7 cases of isolated pulmonary stenosis and 4 cases of operated septal defects no shunt could be detected by isotopic investigation. We conclude that angioscintigraphy is a reliable non-invasive method of detection and assessment of left-to-right shunts. In some cases it may avoid the necessity of cardiac catheterisation. The advantages, limitations and applications of this method are discussed.

Adolescent↗

PubMed1982

[Innominate vein in a subaortic position. Value of contrast echocardiography using a suprasternal approach].

The innominate vein usually lies superior to the aorta: using a suprasternal approach and an injection of contrast in the left arm, it is the earliest and most cephalad structure to be opacified. The aortic arch, right pulmonary artery and left atrium lie respectively below it. This relationship of these four structures is constant in all arrangements of the great arteries, forming the basis of contrast echocardiographic identification of the great vessels in cases of transposition. A case is reported of an innominate vein, the first structure to be opacified, lying inferior to the aortic arch and above the right pulmonary artery. This anomaly seems to be very rare.

Aorta↗

PubMedDate not supplied

[Systemic artery-pulmonary vein fistula. Apropos of a case].

Fistulas between a systemic artery arising from the aorta and the pulmonary vein with absence of a branch of the pulmonary artery and without abnormality of the bronchial tree are very seldom. We report the case of a child which had a continuous vascular murmur with heart failure secondary to a left-left shunt. A left inferior lobectomy was performed. The inferior lobe was the site of a huge arterio-venous fistula between an artery arising, from the aorta and the pulmonary veins.

Adolescent↗

PubMedDate not supplied

[Two-dimensional echocardiography and left heart obstruction in the newborn infant. Diagnostic contribution and impact on therapy].

Thirty-nine neonates with left heart obstructions (LHO) were investigated by two-dimensional echocardiography (2 D echo). Results of 37 investigations were compared with angiographic data (15 cases) and/or anatomic data (surgery: 20 cases; post-mortem examination: 20 cases). 2 D echo was always performed as an emergency procedure and was interpreted before further hemodynamic investigation. Accurate investigation of the left ventricle and of the aorta (arch and proximal branches) was possible in 38 patients (97%) by combining the supra-sternal and subcostal approaches. The existence of LHO and its localization were correctly predicted by 2 D echo in 37 of 39 cases including: aortic coarctation (Ao co) (23 cases), isolated aortic stenosis (iAo S) (5 cases), interruption of the aortic arch (IAA) (3 cases), hypoplastic left ventricle (6 cases), and ranged LHO (2 cases). In 2 patients, one of whom presented with transposition of the great arteries, a coarctation was overlooked and a false positive (Ao co) was found during the same period in a prospective study of 100 neonates by 2 D echo (sensibility 95%, specificity 99%, predictive value 97%). In all patients, 2 D echo made it possible to establish the associated lesions that could modify therapeutics. In no case was emergency diagnostic surgery necessary and the last 9 patients of this series underwent successful therapeutic surgery only on the basis of echographic data.

Aortic Coarctation↗

PubMedDate not supplied

[Williams-Beuren facies with mental retardation and tetralogy of Fallot].

The "elfin facies", described by Williams and Beuren, is usually associated, beside mental retardation, with a supravalvular aortic stenosis and, more broadly, with multiple arterial stenoses. Other types of cardiac defects were described in this context, but the case reported by the authors is the first one with a tetralogy of Fallot. The hypothesis of widerspread histodysplastic lesions is discussed: the process may be early enough to alter the morphogenesis of the cardiac conus and to produce, more lately, the classical stenotic lesions of the arterial wall.

Aortic Valve Stenosis↗