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Biomedical subjects

G Guiraudon

Publications and source records attributed to G Guiraudon.

At least 91 records · Page 5Linked to original sources
PubMed1976

[Intraspinal venous hypertension due to multiple anomalies in the caval system. A major cause of myelopathies].

Increased venous intraspinal pressure is described as a venous system disease, resulting in numerous unexplained paraplegias and tetraplegias. The chronic venous stasis in the intraspinal plexuses, into which the circulation of the spinal cord is drained, is due to the association of multiple abnormalities (stenoses, compressions, thromboses) on the major pathways of the caval and azygos system. The abnormalities, most of which are not known, are demonstrated by a special procedure, the cavo-spinal phlebography, and some of them are subjected to surgery.

Azygos Vein↗
PubMed1976

[Epicardial scintigraphy in 4 cases of ventricular tachycardia caused by reentry of blood after myocardial infarct. Origin of the tachycardia and surgical approach].

110 point cartography was carried out over the ventricular pericardium during sinus rhythm (SR) and during ventricular tachycardia (VT) in four patients whose infarctions were 15 days, 4 months, 4 years and 7 years previously, and in whom electrocardiographic investigation had suggested a ventricular reentry phenomenon. The macroscopical appearances of the heart at operation suggested that the infarct was situated along the left side in two cases, and in or along the septum in two others. Cartography in sinus rhythm showed that the onset of ventricular activity was compatable with a site of origin in the node/bundle of His. Cartography during VT showed up the epicentre of the abnormal impulses which were always situated outside the exit points and dependent upon the node/bundle of His system as demonstrated by cartography in sinus rhythm. Moreover, in at least two cases this was found to lie outside the infarcted area, in portions of the myocardium which could be considered as healthy. In one case it was found to lie along the anterior interventricular groove, facing the septal infarct. In two cases the arrhythmia will not recur, one having achieved this status bu simple ventriculotomy. The failures are reported in relation to the extent of the lesion anatomically, which may cause disorientation of the surgical approach, and make the results difficult to interpret.

Aged↗
PubMed1976

[Epicardial scintigraphy in 4 cases of ventricular tachycardia caused by reentry of blood after myocardial infarct. Study of intra-ventricular conduction disorders in sinus rhythm and in tachycardia, and their relations to anatomical data].

Ventricular pericardial cartography in sinus rhythm (SR) and during ventricular tachycardia (VT) in four cases of myocardial infarction has yielded additional information in the study of conduction disorders in myocardial ischaemia: 1. The significant slowing of activity in SR as well as in VT is demonstrated by this direct method. It is associated with a diminution in amplitude of the pericardial potentials in the zones affected by the ischaemia; 2. Cartography during VT accentuates or reveals disorders of conduction which are slight or latent in SR; 3. Disorders of intra-ventricular conduction are found to be related either to segmental blocks on the branches of the bundle of His, or as focal blocks (peri-infarct block) on the left side, whose nature can be shown up even during VT; 4. Secondary activation of the myocardial fiber found to be related either to segmental blocks on the bundle of His during VT is demonstrated.

Arrhythmia, Sinus↗
PubMed1976

[Treatment of junctional paroxysmal tachycardia, without patent Wolff-Parkinson-White syndrome, by sectioning an accessory Kent-His bundle].

The authors report the case of a patient suffering from a Bouveret's tachycardia without syndrome of Wolff-Parkinson-White. The analysis of the tachycardic spells however showed that during a reciprocal crisis, the circuit went through a left accessory ventriculo-atrial bundle, functioning only in the reverse direction. This accessory bundle was successfully cut by the surgeon, following the procedure of wide atrioventricular desinsertion as described by the authors of Duke University for the surgical treatment of the Wolff-Parkinson-White syndrome.

Adult↗
PubMed1976

[Tricuspid prosthetic replacements. Indications and results].

Out of 350 cases of tricuspid regurgitation operated between 1968 and 1975, a serie of 53 prosthetic replacements (3 of them isolated) was analysed, with specification of operative indications, pre-operative condition, operative findings, procedure used and results. Operative death rate was high (28 per cent) and remote results (6 months to 7 years) were not all satisfactory. This is because functional "tricuspid regurgitation", secondary to advanced mitral lesions, expresses in fact considerable myocardial weakening with severe polyvisceral implications. This picture, where tricuspid patency is in fact contingent, is not always improved by mitral correction and reestablishment of a satisfactory tricuspid function, whatever the procedure used. Thus in very advanced mitral lesions, tricuspid repair should be done only if regurgitation is real and severe. Tricuspid prosthetic replacement should be reserved to valvular destruction; semi-circular annulo-plasty, which is efficient and not very traumatising, is applicable to all the other cases. The best treatment of this syndrome is preventive: as aortic lestions, mitral lesions should be operated early to permit a low risk operation and complete functional recuperation.

Adolescent↗
PubMed1975

[Choice of recipent in human cardiac transplantation].

The favourable clinical results of cardiac transplantation merit wider application of this therapeutic measure in the management of non-obstructive primary cardiomyopathies and diffuse myocardial fibrosis secondary to coronary artery disease and in its terminal phase, in the absence of any absolute contraindication (pulmonary resistance too high, diabetes, gastrointestinal disorder, infection, patient too old.). Close cooperation between departments of cardiology and surgical transplantation centres, with systematic study of the patients pre-operatively and the setting up of a waiting list of recipients, will make possible in the future the improvement of the already encouraging results of cardiac transplantation.

Adult↗