Relationship Between Pulmonary Arterial Resistance and Compliance in Patients with Down Syndrome.

Abstract:

:This study aimed to clarify the characteristics of pulmonary arterial resistance (Rp)-compliance (Cp) coupling in individuals with Down syndrome (DS), who have increased risks of pulmonary arterial hypertension (PAH). We performed cardiac catheterization before and after corrective surgery in 85 DS infants and 85 controls with congenital heart disease and PAH. We retrospectively collected hemodynamic data and compared Rp and Cp between the groups. Age at surgery was 3.5 (2.6-4.6) months. The first and second catheterizations were performed 1 month before and after corrective surgery in both groups. Preoperative Cp in DS patients was significantly lower than that in controls [2.27 (1.62-3.0) vs. 2.50 (1.86-3.31) mL/mmHg/m2, p = 0.039], although there was no significant difference in mean pulmonary arterial pressure and Rp between the groups. Analysis of covariance revealed that the slopes of the preoperative regression lines for the logarithmic transformations of Rp and Cp were identical in DS patients and controls (p = 0.299). However, the postoperative regression line was shifted downward in DS patients after corrective surgery. Postoperative home oxygen therapy (HOT) was performed in 39 patients (36 DS patients) and multivariate logistic regression analysis revealed that postoperative HOT was significantly related to low preoperative Cp (p = 0.039) and DS (p = 0.0001). Individuals with DS have the unique pulmonary vasculature characterized with low Cp that is related to postoperative HOT.

journal_name

Pediatr Cardiol

journal_title

Pediatric cardiology

authors

Iwaya Y,Muneuchi J,Inoue Y,Watanabe M,Okada S,Ochiai Y

doi

10.1007/s00246-019-02080-9

subject

Has Abstract

pub_date

2019-04-01 00:00:00

pages

841-847

issue

4

eissn

0172-0643

issn

1432-1971

pii

10.1007/s00246-019-02080-9

journal_volume

40

pub_type

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