Biomedical subjects

C Cotrim

Publications and source records attributed to C Cotrim.

23 records · Page 2Linked to original sources

PubMed1994

[Non-invasive evaluation of ventricular ejection force by Doppler echocardiography].

UNLABELLED: Left ventricular ejection force as been purpose as a new Doppler ejection phase index, to assess left ventricular performance. In order to evaluate its usefulness, 33 patients undergoing cardiac catheterization were prospectively study. We considered three groups based on angiographic ejection fraction: group A-- > or = 55% (11 patients), group B--35 to 55% (10 patients), and group C-- < or = 35% (10 patients). All patients were in sinus rhythm and mitral regurgitation > I/IV or aortic valve disease were exclusion criterion. The following parameters, derived from Pulsed Doppler aortic velocities curves, were analyzed: peak velocity (cm/s), acceleration time (s), velocity time integral over the acceleration time (VTI Ac-cm), mean acceleration (cm/s2) and ejection force (g.cm/s2). Ejection force as calculated using the mass-acceleration concept, ad: ejection force = mean acceleration x VTI Ac x CsA x 1.06 (CsA - 2D cross sectional area of the aortic annulus; 1.06 - mass density of blood, g/cm3). [table: see text] CONCLUSIONS: The present study confirms that Doppler echocardiography can be used for the assessment of left ventricular performance based on noninvasive measurements and that Doppler derived ejection force is an accurate index for this purpose. However, ejection force evaluation, taking in account the results obtained for mean acceleration, a much less time consuming Doppler derived parameter, appears not to show any clinical advantage.

Adult↗

PubMed1994

[Myocardial infarct and coronary fistula. A rare combination].

We report an unusual case of a 39-years-old male patient, with previous inferior and anterior non Q wave myocardial infarctions, in whom the coronary arteriography showed an arteriovenous fistula between the left anterior descending coronary artery and the pulmonary artery, without any other coronary lesions. We make a revision of this disease and discuss the mechanisms of ischemia.

Adult↗

PubMed1993

[The recurrence of an atrial myxoma in a patient with a mechanical mitral prosthesis--apropos a case].

Recurrence of cardiac myxoma after surgery is an uncommon situation, particularly if a wide excision of the tissue under the tumour has been done. The authors report a case of a 54-year-old male presenting with a left atrial myxoma near the mitral valve, which had to be replaced by a mechanical prosthetic valve during the removal of the tumour. One year later, he was admitted to hospital with persistent fever, weight loss, and congestive heart failure. After a positive hemoculture, intravenous antibiotherapy was initiated, and twice modified because of relapsing fever. Six weeks later, he was transferred to our institution, after an episode of severe acute pulmonary edema. 2D-Doppler echocardiography suggested the possibility of prosthesis dysfunction, revealing a transprothetic diastolic flow with a high peak velocity and moderately elevated pressure half-time. No intra-atrial masses were visualized. Computed tomography was also inconclusive, because of multiple artifacts produced by the prosthesis. These results led to the performance of a cardiac catheterization with contrast ventriculography, which revealed the presence of a transprothetic gradient, and mild mitral regurgitation. The patient was submitted to cardiac surgery, which revealed a recurrent pedunculated left atrial myxoma, with mechanical obstruction of the mitral prosthetic valve. No signs of endocarditis were found. Recurrent cardiac myxomas are reviewed and discussed, as well as the specific problems of the present case, namely the presence of a mechanical prosthetic mitral valve and the initial hemoculture results, with consequent diagnostic delay.

Heart Atria↗

PubMed1993

[Cardiovascular syphilis. Report of 2 cases].

We present two cases of cardiovascular syphilis being one of them a curious case of chronic pericardial effusion associated with cardiovascular complications of lues. In this article we will make as well a review of cardiovascular syphilis.

Adult↗

PubMedDate not supplied

[The echocardiogram in the first attack of rheumatic fever in childhood].

In order to evaluate the contribution of echocardiography (echo) in the first episode of rheumatic fever, 18 children (mean age: 8.5 +/- 2.9 years) observed between 1987 and 1992 have been retrospectively studied. In 11 of them the echo has been done in the first month after the initial episode. By M-Mode echo the most constant finding was a high left atrium: aorta ratio in all cases with clinical carditis. By 2D-echo, hyperechogenicity of mitral valve leaflets and subvalvular apparatus was a common finding, three patients having mitral valve prolapse, one with dilatation of the mitral ring and the other with leaflets not able to coapt. Doppler-echo displayed in 17 patients mitral valve regurgitation, and in three aortic regurgitation. In three children the diagnosis of carditis was made by echo in the absence of murmur. During follow-up mitral valve regurgitation disappeared in four children. The authors conclude that early echo is very important in all children suspected to have rheumatic fever, specially because mitral valve regurgitation can be demonstrated by color flow mapping even in the absence of cardiac murmur.

Adolescent↗