British Journal of Anaesthesia, 1977, Vol. 49, No. 9 927-933
© 1977 The Board of Management and Trustees of the British Journal of Anaesthesia
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SOME CIRCULATORY AND RESPIRATORY EFFECTS OF MORPHINE IN PATIENTS WITHOUT PRE-EXISTING CARDIAC DISEASE
Department of Anaesthetics, The Queen's University of Belfast Northern Ireland
Haemodynamic and respiratory effects of i.v. morphine (10 mg/70 kg body weight) were studied in 10 adults with unimpaired circulatory function. There were significant changes in mean arterial pressure, mean heart rate, respiratory rate and tidal volume, at 10-, 30- and 60-min intervals. Transient changes in mean total systemic resistance and mean stroke volume were also seen at 10 min. The results strongly suggest a peripheral vasodilator response to morphine. Respiratory depression was not demonstrated.