Confirmation of closure of ventricular septal defects

Value of vasopressor agents
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      In a patient with a small ventricular septal defect no shunt was detected by oximetry, hydrogen curves or double-catheter indicator dilution curves. A small shunt was evident when left heart pressures were elevated by pharmacologie means and on selective cineangiocardiography into the left heart. These special studies are necessary before proof of complete closure of a septal defect can be accepted.
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