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Biomedical subjects

J Salazar

Publications and source records attributed to J Salazar.

At least 73 records · Page 4Linked to original sources
PubMed1980

Ventricular septal defect with aneurysm of the membranous septum and a parachute mitral valve. Echocardiographic findings.

The echocardiographic findings in a case of ventricular septal defect with aneurysm of the membranous septum and a parachute mitral valve, are analyzed. An abnormal linear echo was recorded within the left ventricular outflow tract and in the aortic root, and in close relationship with the tricuspid valve. No abnormal systolic echoes were seen neither anterior to the interventricular septum nor in the right ventricular outflow tract. The hypothesis that a parachute m. An abnormal linear echo was recorded within the left ventricular outflow tract and in the aortic root, and in close relationship with the tricuspid valve. No abnormal systolic echoes were seen neither anterior to the interventricular septum nor in the right ventricular outflow tract. The hypothesis that a parachute m. An abnormal linear echo was recorded within the left ventricular outflow tract and in the aortic root, and in close relationship with the tricuspid valve. No abnormal systolic echoes were seen neither anterior to the interventricular septum nor in the right ventricular outflow tract. The hypothesis that a parachute mitral valve without significant obstruction at the infravalvar level is not distinguishable echocardiographically from a normal mitral valve, is confirmed in this patient. This case example further clarifies the origin of the anterior cusp echo of the aorta, due to the close proximity between the membranous septum and the right aortic cusp.

Echocardiography↗
PubMed1979

Symptomatic lower esophageal ring: treatment of 24 patients.

The lower esophageal ring, or Schatzki's ring, consists of a thin, submucosal, circumferential scar which forms a thin incomplete diaphragm in the lower esophageal lumen. The symptoms may be either episodic aphagia or progressive dysphagia, and the severity of symptoms is related to the diameter of the ring. Between 1970 and 1978, we saw 24 patients with lower esophageal rings and complaints of episodic aphagia or progressive dysphagia. Symptoms of esophagitis were present in 20 of the 24. Twenty were treated surgically by interrupting the rings and repairing the sliding hiatal hernias. Two were treated by dilatation and two received no treatment to the ring. Hiatal hernias have recurred in two patients. In one, there is a recurrent ring and in the other, an acid peptic stricture. The ring has responded to dilatation and the peptic stricture to dilatation and repair of the recurrent hernia. Two patients without symptoms of esophagitis, treated by dilatation, are doing well but the follow-up period is so far too short to draw any conclusion.

Aged↗
PubMed1978

Electrocardiographic changes following surgical repair of ostium primum defect.

A four-year-old boy had an OPD with an ECG showing a LAH pattern. After surgical repair the ECG changed to a pattern of LBBB with right axis deviation. This case suggests that early activation of the posterior left ventricular wall associated with partial impairment in the anterior portion of the left bundle, and abnormal hemodynamics, accounts for the superiorly oriented frontal plane QRS axis in patients with OPD.

Bundle-Branch Block↗
PubMed1976

Polysplenia with left ventricular hypoplasia and partial anomalous pulmonary venous connection.

A case is reported of left ventricular hypoplasia associated with anisosplenia. Even though congenital heart malformations are frequently found in cases of splenic anomalies, the association of polysplenia with hypoplastic left heart syndrome is extremely rare. The existence in addition of partial anomalous pulmonary venous connection of the right pulmonary veins to the right atrium, gave us the possibility of study the different changes in pulmonary arteries wall thickness in both lungs.

Abnormalities, Multiple↗
PubMed1976

Differences among cattle and farms as related to beef cow reproduction in the eastern plains of Colombia.

In the tropical savannas of Colombia, the Llanos Orientales, a field survey of 40 beef herds leased by farmers through a cooperative indicated that these herds had mean annual calving rates of 52 and 55 per cent in the Plains and Piedmont zones, respectively. Within zones, very large differences in reproductive rates were found between herds. The differences seemed to be associated with the soils and climates of the areas, condition and weight of cows and breed of cow. Only 9 to 13 per cent of nursing cows were found to be pregnant. Conception was seasonal, occurring mostly in the dry and early rainy seasons. Control of the time of weaning of calves, routine mineral supplementation and improved pasture management appeared to offer immediate possibilities for economically improving output of calves.

Animal Feed↗
PubMed1975

Double-inlet left ventricle with absent sixth aortic arch and multiple cardiac malformations.

The first well-documented case of double-inlet left ventricle in association with absence of the derivatives of the sixth aortic arch of foetal life (the right and left branches of the pulmonary artery and the ductus arteriosus), is reported. In addition there were a total anomalous pulmonary venous connection to the portal vein, an ostium secundum type atrial septal defect and dextrocardia.

Ductus Arteriosus↗
PubMed1975

Single right ventricle (double-inlet right ventricle). A pathological specimen with comments on embryology.

This paper describes a pathological specimen of double-inlet right ventricle in which no remains of a hypoplastic left ventricle were found. An ontogenetic explanation of the malformation is presented based on the development of the normal human embryos. This case may be an example of exaggerated displacement of the atrioventricular canal towards the bulbus cordis in which the left ventricular cavity is extremely hypoplastic or aplastic and is not recognizable. The concept of early and late displacement is introduced.

Female↗
PubMed1970

Ventricular parasystole in acute myocardial infarction.

The clinical and electrocardiographic features of 11 patients with ventricular parasystole in acute myocardial infarction are described. This arrhythmia always appeared within the first 24 hours after the beginning of the pain, and lasted usually a few hours. Only one patient received digitalis before the appearance of the arrhythmia; the others did not receive any drug of known arrhythmic potential. The treatment was mainly with lignocaine intravenously, the response to which was usually very good. There was no relation between this arrhythmia and the plasma potassium levels. The electrocardiographic finding of fusion beats, coupling, retrograde conduction, interectopic interval, ectopic cycle length, and exit block were analysed. Two of the cases were examples of intermittent parasystole. The relation between this arrhythmia and the slow idioventricular rhythm was discussed. It appears that this is a benign arrhythmia, easily controlled by treatment, produced perhaps by the same mechanisms as ventricular tachycardia, but with the existence of exit block.

Acute Disease↗
PubMed1969

Genetic and biochemical studies of partially active tryptophan synthetase mutants of Saccharomyces cerevisiae.

Approximately 20% of the tryptophan synthetase mutants (tr(5)) of Saccharomyces cerevisiae retain activity in one of the half reactions catalyzed by this enzyme and have been identified as indole-accumulating or indole-utilizing tr(5) mutants by complementation tests. Ten indole-accumulating and six indole-utilizing mutants have been studied. For the half reactions they catalyze, these partially active mutants have from about one-half to twice the specific activities of the wild-type enzyme. Indole-accumulating mutant enzymes showed varying responses to pyridoxal phosphate and serine in the assay mixture. The partially active mutants were further characterized by their patterns of allelic complementation and their distribution on the fine-structure map of the locus. It was concluded that these mutants define two distinct functional regions of the tr(5) locus, corresponding to the two half reactions.

Alleles↗
PubMedDate not supplied

Scimitar syndrome: five cases examined with two-dimensional and Doppler echocardiography.

Five patients with scimitar syndrome (three boys, two girls) with a mean age of 3.4 years (range 6 months to 11 years) were studied with two-dimensional and Doppler echocardiography. Four-chamber apical and parasternal short- and long-axis views were obtained, in addition to subcostal views. The anomalous drainage was seen entering the inferior vena cava below the diaphragm in three patients, and in two cases the inferior vena cava was considered normal (both patients had supradiaphragmatic drainage). The anomalous flow velocity pattern was monophasic without reverse flow at atrial contraction. The peak velocity ranged from 0.6 to 1.0 m/s (mean 0.8 m/s). In one case an ostium secundum atrial septal defect was detected. It is concluded that two-dimensional and Doppler echocardiography permit demonstration of the anomalous drainage, analyze the anomalous flow velocity pattern, and detect other associated cardiac abnormalities.

Child↗