PubMed Health⌕ Search

Biomedical subjects

A B Fortuna

Publications and source records attributed to A B Fortuna.

16 recordsLinked to original sources
PubMed1991

[Ambulatory electrocardiographic monitoring: a comparison of ischemic changes of the ST-segment and coronary cineangiography].

PURPOSE: To determine the usefulness of an ambulatory electrocardiographic monitoring system, in identifying atherosclerotic coronary artery disease among symptomatic and asymptomatic patients, through a comparison of ST-segment depression with angiographic findings. METHODS: Fifty patients, 48 men, with the mean age 49 +/- 13 years (range 20 to 73), presenting ST-segment depression, were submitted to coronary angiography, complemented by echocardiogram and exercise testing, when the angiography was considered normal. According to the symptoms patients were divided into three groups: I--asymptomatic (16-32%); II--atypical chest pain (15-30%); and III--angina (19-38%). The Cardiac Care Units (Compass TM) system was used for the ambulatory electrocardiographic monitoring. RESULTS: Twenty-four patients (48%) had significant atherosclerotic coronary artery disease documented angiographically. Twenty-six patients (52%) had normal coronary arteries by angiography: 18 (36%), presented some pathology demonstrated by echocardiographic studies (left ventricle hypertrophy, mitral valve prolapse, non-obstructive septal hypertrophy, dilated cardiomyopathy). Eight patients (16%) had normal echocardiograms, and in (6%) the exercise test was positive and in the other 5 (6%) negative. One of those patients (2%), with negative exercise test, had a myocardial bridge over the anterior descending branch of the left coronary artery, 2 patients (4%) presented symptomatic episodes of ST depression, and 2 other patients (4%) were asymptomatic. CONCLUSION: A comparison of the ST depression analysed in real time during ambulatory electrocardiographic monitoring with the cinecoronarographic findings showed a poor correlation of the two methods in identifying atherosclerotic coronary disease. The ischemic depressions of ST-segment were associated to obstructive lesions or slow flow in the coronary arteries in only 48% of the cases studied.

Adult↗
PubMed1989

[The mitral valve apparatus: an anatomo-echocardiographic approach].

The shape of the mitral valve ring, the position of its chordae and of its leaflets were studied in 34 normal hearts fixed through intra-ventricular injection of tamponate formalin. As the authors have assumed that the post-rigor left ventricle has an architecture very similar to that seen at to the end of ventricular systole, comparisons were made between the anatomical and the echocardiographic features usually seen at the end of the phase of the cardiac cycle. The mitral ring has the shape of a hyperbolic paraboloid, and this peculiar geometry explains why the "apical-four chambers" view, which explores the most superficial ring segments, is the more appropriate view for detecting mitral valve prolapses. In that incidence the valvar diameter is longer (2.43 +/- 0.45 cm) that in the "parasternal view" (1.99 +/- 0.45 cm) and the angle made by the leaflets is comparatively less acute ("four chambers" = 127.41 +/- 16.45 degrees; "parasternal" = 102.05 +/- 0.17 degrees). In the "four chamber" view the point of coaptation (which represents the vertex of the referred angle) is 0.45 +/- 0.17 cm far from the echographic line usually taken as the valvar plane (EVPL-echocardiographic valvar plane line) whereas in the other view, it is more distant from this line (0.59 +/- 0.16 cm). These two last factors make both leaflets closer to the left atrium and explains why mitral valve prolapse, when present, is more easily seen in that incidence.(ABSTRACT TRUNCATED AT 250 WORDS)

Echocardiography↗