Correlation of Pulse Wave Transit Time with Pulmonary Artery Pressure in a Porcine Model of Pulmonary Hypertension

Overview

Journal Biomedicines

Specialty Biomedical Engineering

Date 2021 Sep 28

PMID 34572397

Citations 2

Authors

Fabian Mueller-Graf

Jonas Merz

Tim Bandorf

Chiara Felicitas Albus

Maike Henkel

Lisa Krukewitt

Volker Kuhn

Susanne Reuter

Brigitte Vollmar

Sven Pulletz

Stephan H Bohm

Daniel A Reuter

Amelie Zitzmann

Affiliations

Soon will be listed here.

Abstract

For the non-invasive assessment of pulmonary artery pressure (PAP), surrogates like pulse wave transit time (PWTT) have been proposed. The aim of this study was to invasively validate for which kind of PAP (systolic, mean, or diastolic) PWTT is the best surrogate parameter. To assess both PWTT and PAP in six healthy pigs, two pulmonary artery Mikro-Tip™ catheters were inserted into the pulmonary vasculature at a fixed distance: one in the pulmonary artery trunk, and a second one in a distal segment of the pulmonary artery. PAP was raised using the thromboxane A2 analogue U46619 (TXA) and by hypoxic vasoconstriction. There was a negative linear correlation between PWTT and systolic PAP ( = 0.742), mean PAP ( = 0.712) and diastolic PAP ( = 0.609) under TXA. During hypoxic vasoconstriction, the correlation coefficients for systolic, mean, and diastolic PAP were consistently higher than for TXA-induced pulmonary hypertension ( = 0.809, 0.778 and 0.734, respectively). Estimation of sPAP, mPAP, and dPAP using PWTT is feasible, nevertheless slightly better correlation coefficients were detected for sPAP compared to dPAP. In this study we establish the physiological basis for future methods to obtain PAP by non-invasively measured PWTT.

Citing Articles

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