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Arterial stiffness had been proposed as the cause of sub-clinical left ventricular dysfunction in patients with COPD. Vascular studies in COPD patients were mainly assessed by carotid-femoral (aortic) pulse wave velocity using micromanometer applanation tonometry. The evaluation of pulmonary artery (PA) elasticity in COPD has not been assessed. This study seeks to evaluate indices of PA stiffness in patients with COPD. We hypothesized that patients with COPD would have increased pulmonary artery stiffness compared to healthy individuals. To test this we determine the pulmonary artery area change (distensibility or pulsatility in %) by cardiac magnetic resonance imaging (MRI) and related PA distensibility to the severity of COPD.

Pulmonary artery stiffness in chronic obstructive pulmonary disease (copd) - the mesa copd study