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Biomedical subjects

R Arcas

Publications and source records attributed to R Arcas.

At least 55 records · Page 3Linked to original sources
PubMed1979

[Communication between the right coronary artery and the right atrium. Apropos of 2 surgical cases].

Two cases of anomalous communication of the right coronary artery with the right atrium (the so-called coronary artery fistula) are presented. Both were young females in which a continuous murmur was heard during routine examination. The x-ray image was typical, with a huge bulge in the right border similar to that seen in cases of right atrium enlargement. The ECG was normal in both patients. The diagnosis was made during cardiac catheterization and angiocardiography. A slight left-to-right shunt was present and the aneurismatic dilatation of right coronary artery and communication with the right atrium could be documented. In both cases a surgical closure of the defect was performed, both being well after two years and eight months respectively.

Adult↗
PubMed1977

[Blue rubber bleb nevus (author's transl)].

A case of Blue Rubber Bleb Nevus in a 11 year-old boy is reported. The patient exhibited characteristic hemangiomas of the skin and gastrointestinal tract with an iron deficiency anemia. Historical, clinical, pathological, and surgical features of the condition are discussed. Value of fibroscopic examination in delineation of the cause of persistent gastrointestinal bleeding is pointed out.

Child↗
PubMed1975

[Postoperative evaluation of Carpentier's mitral rings].

38 patients with Carpentier's ring inserted in the mitral position at surgery, are studied. The grade of the pre and postoperatory mitral murmur is correlated and compared with the radiographic size of the heart and left auricle as well as the pre and postoperatory angiocardiographic study. Only 3 (7'8%) of the 38 patients presented significant elevation of the pulmonary artery sistolic pressure together with important angiographic regurgitation. These three patients had to be operated on again, 60'52% did not present murmurs on these were grade I murmurs, while 76'32% did not present mitral reguritation. Only 8 of 14 patients with grade II sistole murmur in the postoperative period had grade II regurgitation. This no correlation was observed between the intensity of the murmur and the grade of angiocardiographic mitral regurgitation. We conclude that Carpentier's ring restores the mitral valve function to normal in the majority of cases and the angiocardiographic results are favorable.

Adolescent↗
PubMedDate not supplied

Thallium scintigraphy in human transplants: a way to detect myocardial damage.

An original index has been derived from thallium images to detect histopathologic changes in heart transplant patients. One hundred eighty-four static and end-diastolic images with thallium were recorded 5 minutes after injection in the left anterior oblique projection. Twenty patients and 14 healthy volunteers were studied. The epicardial and endocardial borders were determined, and the difference of these values was considered the myocardial area. The results in heart transplants were compared with the results of endomyocardial biopsies (N = 142). A significant decrease (p less than 0.01) was found in the index of the myocardial area between normal biopsy results and mild and moderate rejection. Differences were not detected between studies performed in several postoperative periods in the absence of rejection. The results in healthy volunteers prove that the index does not change between studies performed at different times in the same subject, although the value obtained from the end-diastolic image was more constant. On the basis of these results, it is possible to suggest that the decrease in the myocardial area during rejection is the result of a fall of thallium uptake by the myocardium. Capillary endothelial hyperplasia, perivascular infiltration, and myocytolysis can justify these changes, although the presence of other histologic findings, such as intramyocardial edema, could influence the value of this index. We conclude that the uptake of thallium decreases during acute rejection episodes; the results obtained from the images, in this work, are an expression of this event.

Adult↗
PubMedDate not supplied

[Changes in rhythm and conduction after atrial correction of transposition of great vessels].

Disorders of rhythm or conduction after correction by baffle of transposition of the great arteries (TGA) has been widely reported. In order to avoid them, transformations on Mustard original technique have been carried out. We analize here the incidence of arrhythmias during the follow up of 20 patients operated, following a modification of the Mustard technique, as well as the postoperative changes on the P wave. The 75% of the patients remained in sinus rhythm during the postoperative first year, but only 28% continued on it after 6 years. The rest of the patients presented nodal or low auricular rhythm, alternating with sinus rhythm. Seven patients fulfilled diagnostic criteria of sick sinus syndrome. Ninety five percent of the patients were asymptomatic. The 9 patients that performed a stress testing after operation presented sinus rhythm and heart rate acceleration, in spite of the rhythm was nodal at the beginning in 4 of them. The modifications of the Mustard technique apparently do not avoid the arrhythmias and disorders of conduction. Nevertheless, the exercise tolerance remain acceptable.

Adolescent↗
PubMedDate not supplied

Myocardial calcification following heart transplantation.

A case of dystrophic calcification of the myocardium in the transplanted heart of a 34-year-old man is presented. The calcification appeared immediately after transplantation with massive progression until the thirty-fifth day when the patient died. Pulmonary hypertension, cardiac surgery, administration of steroids and calcium chloride, in addition to transitory acute renal failure may be the multicausal factors that produced this myocardial calcification.

Adult↗
PubMedDate not supplied

Study of venous and lymphatic components in the production of edema following femoropopliteal by-pass. A comparative scintigraphy and radiologic study.

Fifteen consecutive patients who underwent femoro-popliteal reconstructions were examined comparatively by X-Ray and radionuclide lymphograms during the first postoperative week. The role of venous and lymphatic involvement and the significance of the surgical technique on the presence and extent of the postoperative edema was investigated. Patients were grouped according to the graft material (saphenous vein vs. PTFE), and the site of distal anastomosis. Edema developed in all but one patient, being more prominent in those with a saphenous graft with the popliteal anastomosis below the knee. Phlebography confirmed venous obstruction in one case. Contrast and scintigraphic lymphograms disclosed several degrees of lymphatic damage (disruption of the vessels and extravasation) in all instances, which correlated with the extent of surgical dissection and the development of postoperative edema. There was good agreement between the two lymphatic imaging techniques.

Aged↗