TY - JOUR T1 - Cardiopulmonary stress test: Desterminations of oxygen consumption, power and cardiac variables at ventilatory threshold. Correlation with values at maximal exercise in COPD JF - European Respiratory Journal JO - Eur Respir J VL - 38 IS - Suppl 55 SP - p2160 AU - Iván Caviedes AU - Rodrigo Soto AU - Paulina Gόmez Y1 - 2011/09/01 UR - http://erj.ersjournals.com/content/38/Suppl_55/p2160.abstract N2 - Background: In normal individuals a direct correlation exists between Oxygen consumption (VO2) and Power (W) measured at ventilatory threshold (AT) and maximal exercise (ME).Purpose: To simplify cardiopulmonary stress test in COPD patients, demonstrating correlation of Oxygen, Power and Cardiac variables at AT and ME.Methods: Prospective study of 44 COPD patients, mean age 63, mean FEV1 73.2%, mean FEV1/FVC 63.6% and mean DCO 56% of predicted. Cardiopulmonary stress test was performed calculating W, VO2, HR, VO2/HR, ΔVO2//ΔW and reduction in Inspiratory Capacity (IC). Lineal regression was calculated between values at AT and ME.Results: Patients ended the test due to dyspnea (Borg 5), reduction of Breathing reserve and IC (17%, -0.33L respectively). Mean Wmax, VO2max and AT of 74%, 85% and 50% of predicted respectively. Close correlation was demonstrated between VO2 and Power measured at AT and ME (r: 0.7 and 0.7 respectively), and between maximal HR and VO2/HR (r: 0.7 and 0.8 respectively).View this table:Correlations between values measured al AT and MEConclusions: A straight correlation was demonstrated in Oxygen, Power and Cardiac variables measured at AT and ME in COPD patients. The duration, effort and risks of Cardiopulmonary stress test may be reduced by the approach to measure Oxygen, Power and Cardiac variables at AT. ER -