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Pulmonary Vascular Input Impedance in Patients with Atrial Septal Defect


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Title: Pulmonary Vascular Input Impedance in Patients with Atrial Septal Defect
Authors: Matsuzaki, Tadaki
Issue Date: 15-Dec-1994
Citation: Acta medica Nagasakiensia. 1994, 39(4), p.107-113
Abstract: Pulmonary vascular input impedance was measured in adults with artial septal defect (ASD) to examine their pulmonary vessel lesions. Pulmonary vascular input impedance is a measure of the resistance of the pulmonary artery detected in the form of pulse wave. This test is more physiological than the conventional test of total pulmonary vascular resistance. The following results were obtained. 1. The pattern of pulmonary vascular input impedance did not differ between the ASD group and the normal control group. 2. An increase in pulmonary artery blood folw volume (a major sign of ASD) resulted in a decrease in Z0 (the average of the pulsatile fraction of the pulmonary vascular input impedance), leading to suppressed elevation in the pulmonary artery pressure. 3. These features of pulmonary vascular input impedance remained unchanged when age advanced. Therefore, if Z0 is higher than its expected from the pulmonary blood flow volume, some accompanying lesions other than ASD may be responsible for such a change.
URI: http://hdl.handle.net/10069/16021
ISSN: 00016055
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:Volume 39, No. 4

Citable URI : http://hdl.handle.net/10069/16021

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