Developmental Pathophysiology, Develop. Physiol., Dr. D. Penney

Figure 4.07 - Use of oximetry to define the site, direction, and magnitude of an intracardiac shunt secondary to a ventricular septal defect. Oxygen saturations are shown in % saturation for each chamber, and the corresponding oxygen contents are shown in parentheses, assuming a hemoglobin concentration of 14 g/100 ml. The substantial increase in oxygen content from right atrium to right ventricle localizes the left to right shunt to the ventricular level.

Abbreviations: PBF = pulmonary blood flow, SBF = systemic blood flow, EBF = effective blood flow

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