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Biomedical subjects

J Molina

Publications and source records attributed to J Molina.

134 records · Page 8Linked to original sources
PubMedDate not supplied

[Surgical treatment of supraventricular tachycardias (Wolff Parkinson White and Occult Kent). Experience at the "Ignacio Chávez" National Institute of cardiology].

We report our initial experience in the surgical section of the accessory pathway in thirteen patients: eight patients with Wolff Parkinson White syndrome and five with accessory pathway functioning only in direction ventricle to atrium (Kent concealed), with recurrent episodes of paroxysmal supraventricular tachycardia with no response to medical treatment. Three of these patients had episodes of auricular fibrillation with interval RR lower than 250 msec and one patient presented syncope. A total of fifteen accessory pathways were sectioned: 7 left lateral, 5 left posterior, one left posterolateral, one right lateral, and another one right anteroseptal. In the same procedure two patients had correction of another heart malformation: one with patent ductus arteriosus and another with and another with atrial septal defect. All patients had successful outcome, one of them needed a second surgery for persistent accessory pathway. We had two post-operatory complications: one mediastinitis and one patient with ectopic auricular tachycardia.

Adolescent↗
PubMedDate not supplied

[Transesophageal echocardiography. General principles and applications].

A new echocardiographic technique is described, which allows cardiovascular ultrasonic exploration by means of a transducer mounted on the distal tip of a gastroscope. The transducer is moved along the esophagus and from time to time into the stomach, which permits real-time visualization of the different cardiac segments and the great arteries. This technique is of special utility in the exploration of posterior structures as are the left atrium and its appendage, the pulmonary veins, etc. The most important views in the transverse plane are described, as well as the technical aspects, the limitations and the possible complications.

Echocardiography↗
PubMedDate not supplied

[The radiofrequency ablation of Mahaim and Kent fibers during the repair of Ebstein's anomaly].

A young man 20 years old was referred to the Institute with Ebstein anomaly. He had experienced palpitations since the age of eight. Those episodes occurred several times a year. During the electrophysiologic study a regular antidromic reciprocating tachycardia was induced using a right atriofascicular connection (Mahaim). The atrial insertion of the Mahaim fibers was in the right posterolateral atrium. Also another orthodromic supraventricular tachycardia was induced with anterograde conduction over atrioventricular node and retrograde conduction over to canceled atrioventricular right posteroseptal bypass tract (Kent). During surgery to repair Ebstein anomaly we decided to perform radiofrequency catheter ablation of both Mahaim and Kent fibers at the tricuspid annulus in the posteroseptal and lateral regions, eliminating accessory pathways conduction. There were no complications during the procedure. The tachycardia has not recur in a six months period of follow up. No antiarrhythmic drugs has been given.

Adult↗
PubMedDate not supplied

[Hematological differences between the effects of roller vs, centrifugal pump].

A secondary complication in the utilization of the CPB (cardiopulmonary bypass) is post-op bleeding due to alterations in the red blood cells and the activation sequences between coagulation, fibrinolysis and complement. We did this study with the objective to evaluate the behavior of the blood cells and coagulation factors using centrifugal pump (n = 12) roller pump (n = 12); we evaluated the consumption of blood products as well as measuring the amount of blood products used. There were no demographic differences between the two groups, the time on CPB was less than 85 minutes, blood flow in the centrifugal pump was maintained at an average of 3.6 l Vs 3.37 l in the roller pump, this being statistically significant. The blood values were compared in each group there were no statistically significant differences, however factor VIII, fibrinogen and platelets presented a tendency (p < 0.05) to be higher in the centrifugal pump group than in the control group (roller pump). Thus 1. In patients in whom we used centrifugal pump there was a tendency for preservation of factor VIII, platelets and fibrinogen. 2. There was no significant difference in the number of blood units transfused between the centrifugal vs roller pump. 3. patients in the centrifugal group were better perfused during CPB.4. 24 hrs. post-op, both groups showed no difference in post-op bleeding.

Adult↗