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Biomedical subjects

G Merino Batres

Publications and source records attributed to G Merino Batres.

At least 19 recordsLinked to original sources
PubMed1999

[Cardiac hydatid cyst in a child].

Cardiac hydatid cyst is an uncommon disease, especially in children. The interventricular septum region is the most frequent localization. The cysts usually involve other organs making the etiologic diagnosis easier. Our young patient presented a single hydatid cyst. The etiologic diagnosis was difficult due to the negativity of the serologic tests and there were no other organs affected. Surgical ablation of the cyst was performed and histopathological analysis achieved.

Child, Preschool↗
PubMed1997

[Fetal cardiac tumors].

INTRODUCTION AND OBJECTIVES: Fetal cardiac tumors are rare and have a different histology than in adults: in the fetus, rhabdomyoma is more prevalent, but myxoma has not been described. We report our experience with nine fetuses with prenatally diagnosed primary cardiac tumours. METHODS: This is an observational and descriptive study of fetuses investigated because of the prenatal and echographic diagnosis of heart tumors. RESULTS: There were nine fetuses with thirteen cardiac masses among more than 700 fetal echocardiographic studies performed by pediatric cardiologists. Histology was available in four of them; three rhabdomyomas and once cavernous hemangioma. In one of the cases, the parents elected to interrupt the pregnancy; three patients died in the neonatal period (two as a direct consequence of the tumors and one due to sepsis) and we have no histological information regarding any of the other five fetuses. The subjects who survived beyond the neonatal period are mostly doing well. However, one developed tuberous sclerosis and another developed a hypoplastic left heart syndrome, perhaps due to the massive restriction of flow across the foramen ovale. The tumors in the other cases were well tolerated and hemodynamic or arrhythmic consequences were minimal of absent. No women with risk factors such as tuberous sclerosis were included in our study. CONCLUSIONS: Fetal cardiac tumors are rare and display a different histology. We recommend a conservative approach to treatment.

Echocardiography↗
PubMed1996

[Fetal supraventricular tachycardia].

BACKGROUND: Fetal supraventricular tachycardia is an infrequent and difficult to manage disease. Several therapeutic approaches have been proposed. We report our experience in its diagnosis and management. OBJECTIVES: Evaluation of the clinical features of fetal supraventricular tachycardia and efficacy of maternal and fetal medications in use for treatment. Immediate neonatal evolution is commented on. A therapeutic schema is proposed. PATIENTS: Nineteen fetuses with echocardiographically (M-mode and/or Doppler two dimensionally oriented) supraventricular tachycardia were diagnosed. RESULTS: Mean gestational age was 32 weeks; 8 fetuses had developed hydrops; 3 patients had dilated cardiomyopathy (two of them were hydropic). Two cases were prenatally diagnosed as atrial flutter (both of them without hydrops). Sixteen fetuses received transplacentary treatment: 8 with digital, 6 more associated with flecainide, direct administration of amiodarone to the fetus was added in two cases. Three patients died during follow-up (one postnatally, at third week of life), all of them had developed hydrops; arrhythmia characteristics were unmodified in three and control of cardiac rhythm was achieved in ten cases. CONCLUSIONS: In the majority of cases there are no cardiac malformations associated. It is possible to control the tachycardia, even if hydrops is present. It is not indicated to abbreviate the gestation. First election drugs are maternal digoxin and flecainide, they do not produce significant fetal or maternal secondary effects. Occasionally it is necessary to add or to change to other drugs or to propose more aggressive approaches.

Anti-Arrhythmia Agents↗
PubMed1994

[Incessant fetal tachycardia coinciding with supraventricular tachycardia of the mother].

The case of a gestant diagnosed fetal arrhythmia in the 35th week of gestation is presented. A fetal echocardiography indicates an aneurysm of the interauricular septum and a fetal supraventricular tachycardia. Also is obtained an ambulatory 24-hour Holter electrocardiograph of the gestant and fetus rhythm. The register makes evident a gestant supraventricular tachycardia and as well a fetal supraventricular tachycardia, occurring in both without clinical company. Following the birth, the tachycardia in the newborn is identified to be automatic and incessant, requiring digital for its control. In postpartum registers of the mother no significant arrhythmia of any type is observed. We conclude that the ambulatory monitoring with a Holter electrocardiograph could be a good method of diagnosis and follow-up of fetal and gestant arrhythmias.

Adult↗
PubMed1993

[The curative treatment of incessant atrioventricular tachycardia by radiofrequency ablation].

The permanent form of junctional reciprocating tachycardia is due to accessory pathways with retrograde long conduction times. We report the localization of the atrial insertion of the accessory pathway and successful ablation with radiofrequency in 3 patients. The participation of an accessory pathway in the tachycardia was demonstrated by atrial capture without changes in the sequence, with ventricular stimuli during His bundle refractoriness. The atrial insertion was localized by mapping near the os of the coronary sinus. In all cases one to three radiofrequency pulses applied at this point interrupted the tachycardia. Retrograde conduction through the accessory pathway reappeared in 30 min or earlier in all, with displacement of the point of earliest atrial activation, and tachycardia recurred. Total abolition of accessory pathway conduction and cure of the tachycardia required new radiofrequency applications, that in one case were done in a second procedure.

Cardiac Pacing, Artificial↗
PubMed1992

[Marfan syndrome in childhood: cardiovascular manifestations. Echocardiographic changes].

We report the cases of eight children with Marfan syndrome. Seven (87.5%) were diagnosed with cardiopathy, everyone with auscultatory findings. Electrocardiographic patterns were nonspecific. Enlargement of the aortic root was present in two of the cases as seen by thorax x-rays. Echocardiography detected the presence of mitral valve prolapse in 87.5% of the patients (7 cases) and aortic enlargement in 75% of the patients (6 cases). Echocardiography also detected the presence of aortic dysplasia, tricuspid valve prolapse and right and left ventricular hypertrophy. During the follow-up period, no case had cardiac failure. There was no mortality. The aortic enlargement was progressive and was not modified by propranolol treatment. Surgical treatment was not needed. Family history related to this condition was present in a very small percentage (37.5%). We comment on one infantile form of Marfan syndrome with its own phenotype different from that of classical Marfan syndrome.

Cardiovascular Diseases↗
PubMed1983

[Anomalous origin of the left coronary artery. Presentation of 5 cases].

Clinical findings are reported in 5 cases of anomalous left coronary artery originating from pulmonary trunk, with reference of ventricular function evaluated through echocardiographic and angio-haemodynamic methods. All patients were catheterized between 7 and 8 months of age. Left atrial and ventricular dilatation, diminished shortening of minor diameter and free wall thickness and septum normal values were obtained by echocardiography. Quantitative angiography of left ventricle demonstrated an elevation of end-diastolic volumes (mean values: 270% of predicted normal). The ejection phase indexes are diminished. The left ventricular mass/end-diastolic volume ratio was low in all cases. Myocardial imaging with thallium-201 demonstrated perfusion defect in lateral area of left ventricle in one patient. The electrocardiographic signs of myocardial necrosis support the diagnosis, and the echocardiographic and isotopic studies may contribute to it. The angio-haemodynamic method corroborate the diagnosis, and the myocardial pump function evaluation may help to decide the most appropriate treatment for this anomaly.

Aortography↗
PubMed1977

[Pulmonary arterial bnading hemodinamic and clinical evaluation in 23 cases (author's transl)].

This is a study of 23 cases with pulmonary plethora and cardiac failure. A "banding" of pulmonary artery was performed, to diminish the pulmonary bloodflow in order to avoid the development of pulmonary hypertensive changes and to improve the heart failure. The mean age of the cases operated upon was 16,9 months. The complications post-banding were: stenosis of the pulmonary outflow tract and necrosis or calcification of the pulmonary artery wall. There was a direct relationship between these complications and the time of persistence of the "banding". The pulmonary artery pressure, distal to the "banding", was reduced as much as 2/3 of the previous pressure in all patients below 6 months and in 63,64% of those patients above 1 year old. A patent ductus arteriosus, complicating the ventricular septal defectis closed prior to perform the "banding" in order to see its role in the pulmonary hyperkinetic hypertension. This is carried out only if pulmonary hypertension remains unaffected.

Blood Pressure↗