Abstract:Background: Protamine sulfate has been found to produce systemic hypotension secondary to acute pulmonary vasoconstriction and subsequent right heart failure in pigs and sheep. Nitric oxide (NO) is a potent pulmonary vasodilator. The present study was aimed to determine whether NO inhalation prevents hypotension in an open-chest canine model.Methods: With IRB approval, 29 mongrel dogs were acutely instrumented during 1.5% enflurane anesthesia. All animals then received protamine 3 mg/kg over 30 s given through… Show more
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