PubMed Health⌕ Search

Biomedical subjects

C Zamora

Publications and source records attributed to C Zamora.

At least 55 records · Page 3Linked to original sources
PubMedDate not supplied

[Fixed fibrous subaortic stenosis. Postoperative evaluation].

Fibrous sub-aortic stenosis in 19 patients surgically treated is discussed. The clinical, radiologic, EKG and cardiac catheterization data in the pre and post-operative evaluations are reviewed. There were no surgical deaths in this series. In 14 cases post-operative cardiac catheterization was carried out, in 11 patients a significant decrease in the gradient was found. In 4 cases pharmacological testing was done during catheterization before and after surgery, without significant change in gradients.

Adolescent↗
PubMedDate not supplied

[Duplication of the mitral and tricuspid valvular orifice. Study of 10 cases].

Ten patients with duplication of the atrioventricular valves were studied, nine of them with the double orifice located in the mitral valve and the other one in the tricuspid. In two cases the diameter of the secondary valve was the same as that of the normal valve, and in the other 8 cases, it was smaller; each had its own valvular apparatus with chordae tendinae attached to papillary muscles located in different sites. The principal malformation in nine was ostium primum. One of the cases with mitral duplication had pulmonary atresia, an association which has never before been published. In five patients regurgitation of the secondary orifice was present; the diagnosis was made during surgery in nine cases and at necropsy in one. The orifice was sutured in three cases because of regurgitation. Four patients died in the immediate post-operative period, including the one with pulmonary atresia. The other three had pulmonary hypertension. These findings agree with the literature. The etiological hypotheses are discussed and emphasis is given to the importance of the finding of a narrow jet of contrast material directed upward and to the right in the left angiocardiogram in frontal plane. The authors believe that this may be an important sign in diagnosing cases with ostium primum septal defect; taking into account the fact that double mitral orifice is the cause of valvular insufficiency, this can be the site of bacterial endocarditis and usually needs to be surgically closed.

Adolescent↗
PubMedDate not supplied

[Superoinferior ventricles].

We describe two patients with under-and-over ventricles. Both were diagnosed angiographically. One has atrial, situs solitus with discordant atrioventricular and ventriculoarterial connections and a ventricular septal defect. The second has atrial situs inversus with concordant atrioventricular connections and double-outlet right ventricle. We review the literature and analyze the probable embryogenesis of the malformation.

Adult↗
PubMedDate not supplied

[Late arrhythmias in the operated interatrial communication. Analysis of sinus node function and the conduction pathways by His bundle electrocardiography].

Four hundred patients with atrial septal defect treated surgically were reviewed. Thirty five (8.7%) developed arrhytmias post-surgery which persisted for over a year. Sinus bradycardia was found in 10 patients, nodal rhythm in 21, and atrial fibrilation and flutter in 4 patients. Thirty five per cent of the patients with late arrhythmias developed related symptomatology. In 14 patients the function of the sinus node was studied with electrical stimulation of the atrium and with His registry. The interatrial conduction time, AV node and His Purkinje were analized employing various stimulation frequencies. All the cases studied had normal intra-atrial conduction; the response of the atrio-ventricular node to increasing frequencies was normal, an the intraventricular conduction remained constant. In 8 patients (52%), alterations of the sinus node were found; these consisted of prolonged post-stimulation pauses, Wenckebach's type sinoatrial block and suppression of sinus automatism employing vagal procedures or through electrical stimulation. A patient with severe bradycardia detected by dynamic electrocardiography had to be treated with a permanent pacemaker. We confirm that these arrhytmias are not produced by lesions of the internodal tracts, and that an alteration of the sinus node is frequent without a concomitant lesion of the intraventricular pathway. The lesion to the nutrient artery could be due to trauma and/or surgically induced. The response to anticholinergic drugs was good. Prolonged observation of these patients could increase the morbility of these arrythmias and raise doubts of the surgical indications in cases with moderate hemodynamic repercussion.

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

[Importance of the systemicopulmonary collateral arterial circulation in congenital cardiopathies].

This paper manifests the importance of the systemic-pulmonary collateral circulation in congenital heart diseases. It shows that through the angiographic and hemodynamic study you should recognize the number, origin, course, and size of each of these arteries because during the corrective surgical treatment of certain types of heart diseases, these arteries should be tied off to prevent cardiac overload during the procedure and to prevent intrapulmonary short circuits from left to right in the postoperative period. The knowledge of the central and peripheral pulmonary arteries is important and because of this it should be remembered that the area of the section of the pulmonary arteries, right to left, together should be at least the equivalent of half of the area of the section of the aorta in its diaphragmatic level, the diameter which permits an acceptable cardiac output after the intervention. If the arteries are adequate a plan of surgical intervention which permits the control of the collateral systemic-pulmonary great arteries should be drawn up.

Collateral Circulation↗
PubMedDate not supplied

[Isolated agenesis of the pulmonary valve in the adult. When is the proper time for surgery?].

The congenital absence of the pulmonary valves is a rare malformation that mainly affects children, frequently is associated with other cardiac malformations and very rarely is present in adults. Elective or urgent surgery is indicated in the symptomatic child; on the other hand, surgical treatment in the asymptomatic adult with this anomaly is controversial. Based on the reported experience in the literature, in the present article, the authors discuss the therapeutic approach of an asymptomatic 22-year-old male with pulmonary valvular absence with practically no hemodynamic repercussion. Although there had been few reported cases of isolated pulmonary valvular absence, the authors concluded that surgery is not a satisfactory solution and that it might be postponed to the time that patients develop congestive heart failure and or respiratory insufficiency. In order to detect that on time, we recommend a follow up based on periodic echocardiographic studies.

Adult↗