A Clinical and Haemodynamic Study of Ventricular Septal Defect in Infants

The concept of ventricular septal defect as

Cerebral Blood Flow in Coarctation of the Aorta

The hemodynamics of coarctation of the aorta have been extensively investigated. These studies have shown that the renal blood flow is within normal limits (1), as in flow to the extremities (2-4), even though the circulation time to the lower parts of the body has a tendency to be prolonged (5). Although coronary blood flow has been reported to be increased (6), the data are quite scattered, and if the two youngest subjects (12 and 15 years old) were excluded, the results would be within normal limits. Left ventricular oxygen consumption was increased in all subjects in the series regardless of age or rate of coronary flow (6). Cardiac output is reported as increased (7) or normal (6) by both the Fick principle an