PubMed Health⌕ Search

Biomedical subjects

S Ramírez

Publications and source records attributed to S Ramírez.

13 recordsLinked to original sources
PubMed1989

[Enterotoxigenic Staphylococcus aureus and thermonuclease: risk indicators of staphylococcal poisoning with milk products].

We examined 159 samples of milk and milk products for staphylococcal count and presence of thermonuclease. Highest count for S aureus was found in cheese, followed by raw milk. Enterotoxins, mostly A and D, were found in 32% of 34 S aureus strains isolated from cheese and milk. Thermonuclease was detected in dried milk and cheese. Identification of this enzyme is a good method to evaluate risk of food poisoning from S aureus contamination.

Animals↗
PubMedDate not supplied

[The usefulness of electrophysiology in a patient undergoing cardiomyoplasty].

The cardiomyoplasty is a new surgical procedure that uses a skeletal muscle electrostimulated in order to reinforce or even substitute partially the cardiac muscle. We present the electrophysiology aspects in a patient with dilated cardiomyopathy that underwent cardiomyoplasty. First the latissimus dorsi muscle was prepared with a neurostimulant ITREL II. During the surgical procedure a dual-chamber pacemaker mode DDD brand CPI was placed. After three months, ablation radiofrequency of the AV node was performed in order to control the atrial fibrillation that caused heart failure. By means of the AV block we obtained synchrony between the ventricular stimulation and the latissimus dorsi muscle, and by this the patient improved. Using the modern pacemakers and radiofrequency we can control the bradyarrhythmias as well as the tachyarrhythmias frequent in patients with dilated cardiomyopathy, increasing the success rate of cardiomyoplasty.

Adult↗
PubMedDate not supplied

[Surgical resection of a focus of ventricular tachycardia guided by endocardial and epicardial mapping].

We describe a case of a 46 years old female with chagasic heart disease. In one year she presented six episodes of sustained ventricular tachycardia, heart rate 230 beats per minute, morphology of RBBB AQRS -60 degrees, with hemodynamic deterioration that needed electrical cardioversion. She was treated with several antiarrhythmic drugs but not good response was obtained. Programmed electrical stimulation was done and it show three different types of ventricular tachycardia, trough pace-mapping the site of the clinical tachycardia was located in the portion inferior and inferior-posterior of the left ventricle that was confirmed by entrainment. Epicardial mapping was performed in 38 ventricular sites following the modified Harken sketch and the location of the site of outlet was confirmed in the posterior base of the left ventricle, at this point the surgical resection was done with no complication. The results were satisfactory. Eight days later programmed electrical stimulation was done and the ventricular tachycardia could not be induced. Six months afterwards the patient is asymptomatic without medical treatment.

Cardiac Pacing, Artificial↗
PubMedDate not supplied

[Atrioventricular and ventriculoatrial conduction in patients operated on for the Wolff-Parkinson-White syndrome].

Over the last decade the surgical treatment of the Wolff-Parkinson-White syndrome has been well accepted. It is important to make an early diagnosis for surgical success. For this purpose we utilized programmed electrical stimulation to assess the functional characteristics of atrioventricular and ventriculoatrial conduction in our post-operative patients. In 55% of the cases we found accelerated nodal conduction. Programmed electrical stimulation correctly identified 90% of successfully treated patients. We did not found any false positive curve, therefore, this method has a high specificity. We concluded that in post-operative patients with the Wolff-Parkinson-White syndrome: 1- There is a high incidence of accelerated nodal conduction and 2- programmed electrical stimulation can correctly identify most of the patients who were successfully treated.

Adolescent↗
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

[Surgical alternatives in the treatment of double-outlet right ventricle].

Double-outlet right ventricle (DORV) is a type of ventriculo-arterial connection, in which both great arteries are connected to the morphologically right ventricle in at least 50% of their diameter. The relation of the great arteries with the ventricular septal defect (VSD) and the pulmonary stenosis, are important anatomical aspects in the election of the surgical technique. In this study we describe four patients with DORV, in whom different surgical techniques were used according to the specific anatomy of each case. Two patients had subaortic restrictive VSD, with subpulmonary stenosis in one of them. In the other two patients the VSD was subpulmonary with the aorta anterior and to the left, in one of these existed moreover a severe mixed pulmonary stenosis. It is concluded, that with different surgical techniques according to the specific anatomy of each patient, good results can be obtained in the surgical treatment of these complex congenital malformations.

Child↗
PubMedDate not supplied

[Tetralogy of Fallot with abnormal coronary arteries].

Between 1980 and 1989 nine patients with Tetralogy of Fallot with abnormal coronary artery underwent surgical treatment. In all but one, the abnormal coronary artery was identified at surgery. Seven (group I) had the anterior descending coronary artery arising from the right coronary artery; one (group II) with had the right coronary artery arising from the left coronary artery and finally, the only case of the group III had left coronary artery arising from the main pulmonary artery. Systemic-pulmonary anastomosis was done in two cases of the Group I, in one due to severe hypoplasia of the pulmonary ring and main pulmonary artery and in the other due to the anomaly of the coronary artery. In the case of the Group II the right coronary artery was accidentally cut and the patient developed right ventricular infarction and died. All surviving are in NYHA functional class I. Nowadays, the preoperative evaluation of Tetralogy of Fallot, can be done by echocardiography despite the possibility of its association with abnormal coronary artery. In special cases aortography or arterial coronarography should be considered.

Anastomosis, Surgical↗