Archivos de cardiología de México
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We sought to analyze exercise-derived mean pulmonary artery pressure (Mpap) - cardiac index (CI) - relationship to expand the concepts regarding its nature and to better identify pulmonary hemodynamic responders to acute oxygen breathing (AOB - 99.5%) in pulmonary hypertension (PH) - COPD patients. ⋯ When exercise derived mPAP/CI is analyzed, valuable information for linearpulmonary vascular resistance - (LPVR) could be obtained for PH - COPD patients. mPAP/CI abnormalities not always reflect "pure arteriolar" increased LPVR for all PH-COPD patients. Hemodynamic benefit on the pulmonary circulation and right ventricular afterload could be expected with long-term oxygen therapy in resting <30 mmHg mPAP-PH-COPD patients.