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Biomedical subjects

J Esquivel

Publications and source records attributed to J Esquivel.

28 records · Page 2Linked to original sources
PubMedDate not supplied

[Clinical features of idiopathic mitral valve prolapse].

This paper ask a question; is there a generalized defect of the connective tissue among subjects with primary mitral valve prolapse? Based on clinical methods it was found that paired subjects with and without primary mitral valve prolapse, are different in respect of an arbitrary score of joint hypermobility and phenotypic features. This is a statistically significant difference and suggest a possible molecular defect affecting connective tissue in people with primary mitral valve prolapse. Therefore, biochemical and molecular studies should be done to further characterize this abnormality.

Adolescent↗
PubMedDate not supplied

[2-dimensional echocardiography in fixed fibrous subaortic stenosis. Correlation with hemodynamics and M-mode echocardiography].

Comparative diagnostic capacity is analyzed between two dimensional echocardiography (E-BD), hemodynamics, surgery and the M-Mode, to accurately establish the diagnosis, variety and severity of fixed fibrous subaortic stenosis, in 29 patients, whose previous diagnosis were made by two dimensional images, using paraesternal, apical and subxiphoid long axis. Group I is made up of 17 patients who had two dimensional echocardiography, M-Mode, and catheterization; Group II is composed of 12 patients who only had two-dimensional echocardiography and M-Mode. Within Group I, hemodynamics showed subaortic gradient in 81%, transvalvular in 13% and no gradient in 6%; the ventriculography showed subaortic obstruction only in 59% of the patients and was normal in 41%. The M-Mode echocardiography registered protosystolic aortic closure (CPSAo) in 50%; the subaortic obstruction was seen as a band, in 44%, non-specific echoes in the outflow tract in 12% and this was normal in 44%. The two cases with transvalvular gradient, the M-Mode registered the subaortic band, and in the case without gradient, the ventriculography showed the subvalvular obstruction. In Group II, the diagnostic signs of M-Mode were: CPSAo in 58%, band in 17%, non specific echoes in the outflow tract in 8%, and this was normal in 75%. The results support other data in that two-dimensional Echocardiography is more sensitive and more specific than M-Mode, intraventricular pressure curves and ventriculography.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗
PubMedDate not supplied

[Supraventricular paroxysmal tachycardias with normal electrocardiogram in sinus rhythm].

Paroxysmal supraventricular tachycardia (SVT) was studied in 46 patients with normal electrocardiogram (ECG) during sinus rhythm (SR), All of them had had at least one SVT crisis. They all complained of palpitations starting and ending abruptly, and of more than one hour duration. There were never seen ECG alterations suggesting ventricular preexcitation during SR. An electrophysiologic study using atrial and ventricular programmed stimulation and intracardiac electrograms, was used to establish the diagnosis. There was no significant difference in sex or age distribution according to the ethiologic diagnosis. It was found that 67.4% had a concealed accessory bundle, responsible of the SVT, 32.6% had A-V nodal reentry (p less than 0.01). Of all concealed accessory bundles, 67.7% were left lateral Kent (45.6% of all patients). It is discussed the possibility of antegrade conduction through concealed bundles during SR and that this may be seen by means of a M-mode echocardiography. We conclude that neither sex nor age help to suspect ethiologic diagnosis; the most common accessory bundle is the left lateral Kent and that in some cases it can be detected by M-mode echocardiography. This accessory bundle is the most usual cause of SVT in patients with normal ECG during SR.

Atrioventricular Node↗
PubMedDate not supplied

[Turner's syndrome and heart surgery. Presentation of 3 clinical cases].

Three patients with Turner's Syndrome are shown; one associated with coarctation of the aorta, other with patent ductus arteriosus and the last one with congenital valvular aortic stenosis. The cytogenetic and clinical picture of the disease are reviewed, also its association with some cardiovascular malformations. The results of the surgical treatment of the congenital heart disease are reported. The difficulties to establish the operatory indication are described and besides the technical problems that occur frequently in these patients.

Adolescent↗
PubMedDate not supplied

[Congenital abnormalities of the tricuspid valve and Ebstein's anomaly with pulmonary valvular stenosis].

We are reporting a case of Ebstein's anomaly of the tricuspid valve and another case of a congenital double tricuspid lesion, both associated with pulmonary valve stenosis and with similar hemodynamics and physiopathology. Given that there are few reported cases in the literature, we analyzed the clinical and electrocardiographic findings of both. The utility of the echocardiogram is discussed in the diagnosis of such abnormalities and the angiographic and hemodynamic data commented upon. It is emphasized that right ventricular hypertension (105 mm Hg, and 98 mmHg, respectively) modifies the cardiopathic hemodynamics and its natural history, that was favorably modified by isolated corrective surgery of the pulmonary obstruction. The postoperatory transvalvular gradients were measured at 27 and 11 mm Hg, respectively. After having revised the pertinent bibliographic literature, we commented upon the factors that give such a high mortality rate in Ebstein's surgery and the congenital abnormalities which are most frequently associated.

Child↗
PubMedDate not supplied

[Surgical correction of acute congenital cardiopathies in the newborn infant].

The experience of the Cardiac Surgery Service at the Hospital del Niño IMAN with the deep hypothermia method and hemodynamic arrest is shown in 30 infants with severe congenital cardiac malformations. The procedures followed before and during the operation are carefully described in their three aspects; anesthesia, extracorporeal circulation and surgery, including postoperative care. Ventilatory assistance is stressed. Results are analyzed considering postoperative evolution; stress is made on the causes of morbidity and mortality. Considering the results of this and other similar reports, we believe that the deep hypothermia method and heart arrest in treating severe cardiac malformations in infants are of outstanding importance since they have significantly improved results in these problems.

Anesthesia, General↗