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Biomedical subjects

D Richard

Publications and source records attributed to D Richard.

At least 199 records · Page 11Linked to original sources
PubMed1976

[Diagnosis of myxomas of the left auricle by ultrasonic echography].

The two case histories of myxoma of the left auricle reported in this paper illustrate how echography is a diagnostic method which is non-invasive, simple, and relatively accurate provided that different angles of incidence are used, and especially the "root aorta-left auricle" incidence. It is indicated especially in cases with variable mitral murmurs on auscultation, but also where there is a very large left auricle, heart failure of unknown cause, or even an apparently straightforward case of mital stenosis. Moreover, as one of these case histories demonstrates, the technique allows both short and long term postoperative follow-up to be carried out with ease and safety, so that a possible recurrence can be picked up later.

Adolescent↗
PubMed1975

[Study of the action of acebutolol on the parameters of cardiac contraction measured by ultrasonic echography].

Recording by means of echography the motions of the posterior wall of the left ventricle makes it possible to compare in subjects acting as their own controls the amplitude of the movement, contraction and decontraction time of the myocardium before and after medication. This report concerns the variations recorded in 10 healthy patients before and after oral administration of 200 mg/day of acebutolol for 10 days. A statistically significant decrease of 8-9 p.cent of the various parameters was found. It probably reflects the negative inotropic action exerted by the drug.

Acebutolol↗
PubMed1975

[Determination of myocardial contractility using ultrasonic echography].

Ultrasonic echography makes possible the recording of movements of the septum and posterior wall of the left ventricle. On graphic records of good quality it is thus possible to measure accurately the transverse diameter of the left ventricle throughout systole and to determine the average and maximal speeds of decreases in this diameter, which are proportional to the VCF. Echography, a non-invasive technique, thus gives data with regard to myocardial contractility of similar value to the information provided by cineangiocardiography. In those cases where it is not possible to obtain such tracings, an approximation may be made, validity of which appears to be confirmed by clinical experience.

Cardiac Output↗
PubMed1975

A study of geniculate unit activity during cryogenic blockade of the primary visual cortex in the cat.

In cats under nembutal or chloralose anesthesia, unilateral temporary cryogenic blockades of the primary visual cortex were performed and their influence on unitary responses to restricted light spots was tested in the ipsilateral geniculate nucleus. No significant effect could thus be observed, at variance with previous positive results obtained by our group in structures like superior colliculus and pulvinar complex using the same experimental procedure.

Animals↗