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Pulmonary Hypertension and Hypoxic Pulmonary Vasoconstriction
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This book describes the role of extracellular and §intracellular calcium in hypoxic pulmonary §vasoconstriction (HPV) which can lead to pulmonary §hypertension. In the lungs, HPV can markedly raise §pulmonary arterial pressure. A temporary, moderate §rise in pressure may not be damaging; however, §persistent hypertension (due to chronic hypoxia) can §lead to right heart failure and pulmonary§oedema. Acute HPV can arise from any clinical §condition which results in alveolar hypoxia e.g. §causes of airway obstruction including asthma, §ventilatory insufficiency caused by neurological §defects, deformities of the thoracic skeleton, or §lung damage. Chronic HPV, by contrast, is usually §irreversible due to re-modelling of the pulmonary §vasculature casued by diseases such as emphysema. §This book presents experimental data supporting the §thesis that calcium sensitization mediates HPV. The §role of caffeine, ryanodine, NADH and cyclic ADP §ribose (cADPR) levels in calcium sensitization are §explored as potential new therapeutic targets for §pulmonary hypertension.
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