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- W2023772891 abstract "Hypoxia is the major cause of pulmonary hypertension and right ventricular hypertrophy in chronic obstructive pulmonary disease, cystic fibrosis, kyphoscoliosis, chronic mountain sickness, and the obesity-hypoventilation and sleep apnea syndromes. Pulmonary hypertension develops in these patients because the long-standing vasoconstriction produced by hypoxia causes muscular hypertrophy of the pulmonary arteries and arterioles. These pathologic changes may regress if alveolar hypoxia is corrected and hypoxic pulmonary vasoconstriction is continuously inhibited. Intermittent inhibition of hypoxic pulmonary vasoconstriction does not reverse these pathologic changes. Since patient noncompliance with oxygen therapy makes it difficult to achieve continual relief of alveolar hypoxia, a drug that inhibits hypoxic vasoconstriction may be useful. Experimental findings indicate that hypoxic pulmonary vasoconstriction requires calcium influx and can be inhibited by certain slow-channel calcium blockers. Studies also demonstrate that slow-channel calcium antagonists can attenuate the pulmonary hypertension and right ventricular hypertrophy produced in rats by chronic hypoxia. Recently, two studies have shown that nifedipine inhibits hypoxic pulmonary vasoconstriction in patients with chronic obstructive pulmonary disease. If further studies demonstrate that these short-term effects are sustained, certain slow-channel calcium blockers may become a useful adjuvant to low-flow oxygen therapy in the treatment of hypoxic pulmonary hypertension." @default.
- W2023772891 created "2016-06-24" @default.
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- W2023772891 date "1985-02-01" @default.
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- W2023772891 title "Calcium channel blockers in hypoxic pulmonary hypertension" @default.
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- W2023772891 doi "https://doi.org/10.1016/0002-9343(85)90165-2" @default.
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