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Biomedical subjects

R Tricot

Publications and source records attributed to R Tricot.

At least 37 records · Page 2Linked to original sources
PubMed1976

[Pericarditis and fresh myocardial infarction (author's transl)].

Among 400 patients with myocardial infarction who had been admitted to the intensive care department, pericarditis was observed in 64 cases (16%). It occurred more frequently with anterior wall infarctions. The influence of the pericarditis on the mortality and complications threatening in the acute period were particularly investigated: There was no significant difference with regard to the mortality (20.6% in the group with pericarditis, 26.2% in the control group) or the occurrence of cardiac insufficiency or arrhythmias as complications. Atrial flutter, however, is more frequent (25% against 15%). Anticoagulant therapy was discontinued when pericarditis appeared, with one exception. In spite of the high frequency of atrial flutter, embolic complications were not more frequent after discontinuing the anticoagulant therapy. A postmyocardial infarction syndrome was observed seven times (1.7%), it was frequently found in a pericarditis with angina pectoris (4/7) and with ventricular aneurysm (3/7). Hemopericardium occurred in one patient in whom anticoagulant therapy had not been discontinued.

Acute Disease↗
PubMed1976

[Studies of nodal conduction].

Nodal conduction has been studied in 44 normal subjects, 21 cases of 1st or 2nd degree AV block, 16 cases of LGL syndrome, and 19 patients with a distal infra-His AV block, by means of stimulation which was increased in regular steps of 5 beats per minute, and of extra-systolic stimulation. These two techniques demonstrate that the nodal response to an extrasystole or a regular tachycardia is not the same, and that different mechanisms are probably at play. With regular stimulation, the normal limits of 1/1 conduction lie between 140 and 200 per minute. A nodal block for a rate less than 130 per minute can be taken as indicative of a nodal defect. Delayed AH conduction is a much less precise criterion. It may reach a high level in normal subjects, and it is not certain that the finding of a PR interval of more than 200 msec. (AH of more than 140 msec.) at a normal rate is neccessarily indicative of nodal pathology. Cases of LGL syndrome are associated with short-circuits which are usually partial. The diverse responses observed in these different groups can be explained by modifications of structure within the A/V node itself.

Aged↗
PubMed1976

[Echocardiographical study of 2 cases of aortic dissection].

The authors report two cases of acute dissection of the ascending aorta and aortic arch. An urgent ultrasonic investigations showed, in both cases, signs of reduplication of the parietal image, which is highly suggestive of the condition; this was confirmed by angiography. These two cases enable us to discuss the criteria for this diagnosis, the limitations of the method, and its very real application in problems of differential diagnosis of acute chest pain.

Acute Disease↗
PubMed1975

[Echography in heart valve diseases].

The authors discuss the value of echorcardiography in cardiac valvular disease. Exploration of the mitral valve gives very precise data concerning diagnosis and evaluation of the degree of mitral stenosis. It may be of value in the diagnosis of certain complications such as intra-atrial thrombosis and gives reliable information in postoperative surveillance. In mitral insufficiency, echocardiography sometimes permits the recognition of certain mechanisms such as rupture of the cordae, ballooning of the lesser cusp and abnormal kinetics in obstructive cardiomyopathy. Exploration of the aortic valve is less informative. Aortic insufficiency gives scarcely any direct signs, whilst echocardiography is of value in aortic stenosis. Ultrasonic study also is useful in surveillance of the kinetics of valvular prostheses. The total absence of risk makes repeated studies possible, rendering echocardiography an essential element in the study of valvular disease.

Aortic Valve Insufficiency↗
PubMed1975

[Recording of conduction tissue potentials in intraventricular conduction disorders. (apropos of 147 patients)].

147 patients, 31 controls and 116 patients with intraventricular conduction disturbances, have been submitted to an endocardial investigation: HR lengthening in case of bundle-branch block indicates a low diffusion of the conduction disturbances and has a pejorative signification. The most important legthenings of this interval have been observed in the cases with delay in the common trunk of His bundle: -- In case of trunkular delay, 66% of the patients have a HR interval longer than 80 msec, and the average value of HR is 82 msec. -- In the absence of obvious trunkular delay, 8% of the patients only have a HR interval longer than 80 msec, with an average value of 67 msec. For these latter patients no branch potential was recorded. -- In some cases one is certain of the presence of a conduction disturbance of both branches and the HR value then never exceeded 60 msec. -- Branch potential recording makes it possible to determine the site of the conduction disturbance of the branch and show mild variations of the HR interval and of both components.

Action Potentials↗