Abstract
A study has been made of the effects of xanthine derivative (pentoxifylline) upon the general and cardiac haemodynamics of intact anaesthetised dogs. The drug increased heart-rate, respiration rate, cardiac output and systemic pressure. It reduced mean pulmonary arterial pressure. Coronary flow was increased for only a few minutes, but coronary sinus O2 content increased throughout the study. Lactate and pyruvate values increased in both artery and coronary sinus, as did the cardiac extraction of these substances. Cardiac extraction of non-esterified fatty acid increased.
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