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Eur Respir J 2000; 16: 282-287
Copyright © ERS Journals Ltd 2000

Original Articles

Pulmonary artery pressure measurement during exercise testing in patients with suspected pulmonary hypertension

DA Raeside, A Smith, A Brown, KR Patel, R Madhok, J Cleland, and AJ Peacock

It is recognized that exercise produces abnormally large increases in pulmonary artery pressure in patients with pulmonary vascular disease as a consequence of a variety of disorders, but the relationship between pressure and cardiopulmonary exercise performance is poorly understood. This lack of understanding is due (in part) to difficulty making measurements of pulmonary haemodynamics using conventional fluid filled catheters. This article seeks to improve understanding by comparing variables measured during formal exercise testing with simultaneous measurements of pulmonary artery pressure using a micro-manometer tipped catheter. Ten patients with suspected pulmonary hypertension were studied using a micromanometer tipped pulmonary artery catheter, during cardiopulmonary exercise testing. Ventilatory equivalents for oxygen and carbon dioxide correlated with the pulmonary artery pressure measured on exercise, but oxygen pulse and oxygen uptake did not. Ventilatory equivalents, noninvasively measured during exercise, may merit further study as potential surrogates of pulmonary artery pressure and hence be useful in identifying individuals at risk of developing pulmonary hypertension.


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