W HEN there is a right-sided aortic arch, persistence of a left-sided ductus arteriosus can readily be demonstrated by angiocardiography. This is important because in some types of eyanotic congenital heart disease, such as in the tetralogy of Fallot, anl artificial aortico-pulmonary (Blalock-Taussig' or Pott S2 shunt) is often created in order to alleviate the distress produced by anoxia. Two ...

The fetal circulation is unique in having the right ventricle perform as a systemic pump delivering oxygen-enriched placental blood to the distal fetal systemic circulation via the ductus arteriosus. Both ventricles then operate at similar systemic pressures. For this reason, the pressure gradient across the interventricular septum is known to be minimal. It has been noted, however, in fetuses ...

We studied the hemodynamic effects of dynamic exercise during cardiac catheterization in 35 children and adolescents with small-to-moderate ventricular septal defects. Eighteen of them exercised at 25% and 50% of their maximum workload and 17 exercised at 60%. There was no significant difference between the two groups with respect to age and body mass, height, and surface area. The changes evok...

We report an infant with left eye blinking seizures accompanying a left (ipsilateral) fronto-temporal scalp EEG ictal pattern. The epileptogenic lesion was a left frontal encephalomalacia along the ventriculo-peritoneal shunt tract. The shunt was inserted for treatment of communicating hydrocephalus. This case illustrates the lateralizing value of the ictal blinking. Review of the literature su...

the right lung becomes functionally impaired as a result of lung disease or surgery. For instance, a right pneumonectomy could have fatal consequences in a patient with partial anomalous pulmonary venous drainage of the left upper lobe. In such a situation, shunt volume would dramatically increase to 50% of total pulmonary blood flow, and only the left lower lobe would be contributing to the sy...

BACKGROUND Shunt vessels were imaged and shunt flow was analysed by cross sectional and Doppler echocardiography in 12 patients who had had 14 shunt procedures (nine left Blalock-Taussig shunts, three right Blalock-Taussig shunts, one modified Waterston shunt, and one central shunt). METHODS The shunt vessels were classified by echocardiography as uniformly patent, segmentally stenosed, and u...

A 22-year-old female, a known case of neurofibromatosis 1 (NF1), presented with a congenital swelling in the left occipital region. She had developed recent onset dysphagia and localized occipital headache. Neuroradiology revealed a left occipital meningoencephalocele and a left parapharyngeal meningocele. This was associated with ventriculomegaly. She was advised on cranioplasty along with dur...

The modified Blalock-Taussig shunt is commonly performed as early palliation in cyanotic congenital heart disease. To highlight unusual diagnostic problems in such patients, two cases are reported in whom shunt complications were initially diagnosed as lobar pneumonia and tuberculosis, respectively. The children, an 8 month old boy and a 3 year old boy, had false aneurysm secondary to infection...

INTRODUCTION This is a report of a 56-year-old man who became hypoxic due to an acute right to left shunt after sustaining a myocardial infarction involving the right ventricle. This case provides the opportunity to review several key pathophysiologic concepts in the setting of acute right ventricular infarction. Although the development of an acute right to left shunt is a rare complication of...