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(Circulation. 2000;102:1718.)
© 2000 American Heart Association, Inc.
Current Perspective |
From the Cardiovascular Section, Boston University Medical Center, Boston, Mass.
Correspondence to Wilson S. Colucci, MD, Cardiovascular Section, Boston University Medical Center, 88 E Newton St, Boston, MA 02118. E-mail wilson.colucci{at}bmc.org
AbstractPulmonary vascular resistance is frequently elevated in patients with chronic left ventricular failure as a result of dysregulation of vascular smooth muscle tone and structural remodeling. The former is reversible over a period of minutes to days by pharmacological vasodilators, whereas the latter is relatively fixed and may resolve only slowly, over months to years. These abnormalities are due, at least in part, to pulmonary vascular endothelial dysfunction that results in impaired nitric oxide availability and increased endothelin expression. In patients with chronic heart failure, the resulting pulmonary hypertension directly affects right ventricular function and may affect exercise capacity, morbidity, and mortality. New treatment strategies, which include the use of agents that increase nitric oxide availability or oppose the actions of endothelin, may improve the structure and function of the pulmonary vasculature in patients with chronic heart failure.
Key Words: heart failure hypertension, pulmonary nitric oxide endothelin
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