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Pulmonary vascular input impedance is a combined measure of pulmonary vascular resistance and stiffness and predicts clinical outcomes better than pulmonary vascular resistance alone in pediatric patients with pulmonary hypertension.
Hunter KS, Lee PF, Lanning CJ, Ivy DD, Kirby KS, Claussen LR, Chan KC, Shandas R. Hunter KS, et al. Am Heart J. 2008 Jan;155(1):166-74. doi: 10.1016/j.ahj.2007.08.014. Epub 2007 Sep 27. Am Heart J. 2008. PMID: 18082509 Free PMC article.