We studied the effect of vasodilation on regional myocardial blood flow and oxygen consumption of the left ventricular free wall by infusing 10 micrograms/kg/min sodium nitroprusside into 7-week-old conscious lambs with and without aortopulmonary left-to-right shunts. Resting myocardial oxygen consumption in the 13 shunt lambs was significantly higher than in the nine control lambs (989 +/- 104...

transannular patch was placed and stent flow was interrupted with a clip. A 1500-g neonate diagnosed with pulmonary atresia with ventricular septal defect, right aortic arch, ductus left and left superior vena cava, was administered prostaglandin to 2 months and underwent a right MBT shunt. Prostaglandin perfusion was restarted at 24 h as saturation was <65%. Echocardiography detected no flow i...

T he left ventricle-right atrium (LVRA) shunt, a rare and special type of ventricular septal defect (VSD), was first reported by Gerbode et al1 in 1958, and was thus termed “Gerbode defect”, after the first author. In 1967, Riemenschneider and Moss2 classified Gerbode defects into two types: direct (or true) and indirect (or false). The direct type is a direct shunt between the left ventricle a...

The primary purpose of this study was to attempt to select, by examination of the time interval histogram (TIH) output of a range gated pulsed Doppler (RGPD), all children with left-to-right shunt at the atrial level from a pool of 57 children. Fifty-four of the children had various forms of acyanostic cardiac disease. A secondary purpose was to identify any associated lesions in those children...

et al., 1957; Bruce and John, 1957; Swan, Marshall, and Wood, 1958; Stephens, Shafter, and Bliss, 1964), but some uncertainty remains about the conclusions. Since any attempt to understand the disability of such patients depends on these, we have attempted a further investigation into the changes occurring during exercise. This paper deals with the hemodynamics, and a following communication is...