Abstract
To elucidate the pathophysiologic significance of adrenomedullin in pulmonary hypertension, we measured plasma adrenomedullin-like immunoreactivity (AM-LI) concentrations in blood samples obtained from various sites during cardiac catheterization by using radioimmunoassay in patients with pulmonary hypertension in comparison with patients without pulmonary hypertension. In patients with pulmonary hypertension, plasma AM-LI concentrations were significantly elevated and there was a significant uptake of AM-LI in pulmonary circulation, indicating the involvement of adrenomedullin in the cardiovascular regulation of pulmonary circulation in pulmonary hypertension.
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