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Biomedical subjects

N B Reis

Publications and source records attributed to N B Reis.

At least 19 recordsLinked to original sources
PubMed1989

[Hemodynamic profile of patients with normal coronary cineangiography].

The authors reviewed 1474 consecutive selective coronary arteriograms performed on patients with suspected coronary insufficiency for the diagnosis of obstructive coronary disease and found 281 (19.1%) cases of apparently normal coronary arteries. These patients presented mean age of 47 +/- 10 years; they were 135 (48%) males and 146 (52%) females. The objective of this study was to obtain the hemodynamic profile of these patients for the following parameters: a) aortic and left ventricular pressures; b) volumes, ejection fraction, segmentary contraction, wall thickness and mass of left ventricle; c) morphology, mobility and competence of the mitral valve. Eight groups of patients were selected: 1) without hemodynamic alterations - 18.9%; 2) with systemic arterial hypertension - 48.7%; 3) with abnormal myocardial contraction - 16.7%; 4) with idiopathic left ventricular hypertrophy - 6.4%; 5) with mitral valve prolapse - 2.5%; 7) with myocardial bridge of the left anterior descending coronary artery - 1.8%; 8) with coronary arterial microfistula of the left ventricle - 0.4%. It is desirable to determine before situations of cardiac emergencies, whether provoked ischemia, as detected by noninvasive stress testing, is present before the performing coronary arteriography in patients, specially females, with systemic arterial hypertension, left ventricular hypertrophy, disorders of ventricular contraction or mitral valve prolapse.

Adult↗
PubMed1989

[Extensive partial agenesis of the left pericardium. An anatomo-clinical correlation. Report of 2 cases].

The authors report on two patients with large partial congenital defect of the left pericardium, as observed at post-mortem examination. In both cases, diagnosis was made during life thanks to the clinical syndrome described by Abbott, Sothworth and Stenvenson. In the first case diagnosis was confirmed by pneumothorax proposed by Ellis et al and the second case was recognized by the clinical-radiological syndrome. The first patient was followed until his death. Because of an abnormal echogram, he was submitted to exploratory cardiotomy and small ASD, aneurysmatic dilation of Valsalva sinus and mitral regurgitation by ruptured chordae tendineae were found. The autopsy, besides the findings at the operation, showed residual adhesive pericarditis with a cavity at the postero-superior region of the heart behind the left auricle and a redundant tricuspid cusp. The association of congenital pericardium defect to mitro-tricuspid redundant cusps and aneurysmatic dilatation of the sinus of Valsalva--suggesting myxomatous degeneration--plus atrial septal defect as in case 1, has not been found in the medical literature. In the second patient the defect was recognized in spite of congestive heart failure and severe tricuspid regurgitation.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1989

[Cardiac performance and hemodynamic response under the effect of isoproterenol and D-isosorbitol in patients with dilated cardiomyopathy].

The authors studied cardiac performance of 36 patients with dilated cardiomiopathy through cardiac catheterization and left ventriculography in comparison with a control group. It has been verified that the end systolic volume (ESV) is more sensitive than ejection fraction (EF) as an indicator of the presence and degree of systolic dysfunction. Isoproterenol (IP) (18 patients) and D-isosorbitol (IS) (18 patients) have been used in the evaluation of hemodynamic response of DM. It has been verified equivalent responses such as: 1--decrease of ESV and end diastolic pressure (EDP); 2--increase of stroke volume and EF. The contractility indexes of left ventricle, however, showed different responses to the 2 substances: 1--with IP there was an increase of peak dp/dt and common peak isovolumetric pressure (CPIP 45 mmHg); 2--with IS there was no variation. The authors conclude that: 1--IP or similar drugs may be used during cardiac catheterization to evaluate the contractile reserve of the myocardium; 2--IS may be used in ambulatorial treatment of DM to improve ventricular function through a tendency to normalize intracardiac pressure-volume relation.

Adolescent↗
PubMed1982

Improved visualization of aortopulmonary collateral arteries by abdominal aortic compression during angiography.

Increased filling of aortopulmonary collateral arteries occurs when the descending aorta is obstructed distal to their origin. We used this fact to develop a simple, safe technique for improving angiographic visualization of these arteries. The abdominal aorta is manually compressed against the spine during injection of contrast medium. A slight reflex bradycardia resulted, which probably also enhanced filling of the collateral arteries. In eight infants and children with either pulmonary atresia and a ventricular septal defect or truncus arteriosus communis, excellent visualization was consistently achieved without complication.

Angiography↗