PMID: 6110816Mar 14, 1981Paper

Prostacyclin: haemodynamic and metabolic effects in patients with coronary artery disease

Lancet
G BergmanD E Jewitt

Abstract

The therapeutic potential of prostacyclin was evaluated in 10 patients with angina pectoris and angiographically proved coronary artery disease. Platelet aggregation and coronary and systemic haemodynamic effects were examined before and after intravenous infusions of 2, 4, 6, and 8 ng/kg/min of prostacyclin and were dose related. At 8 ng/kg/min the ADP concentration required to induce 50% of maximum platelet aggregation increased from 1.8 to 4.5 mumol/l (p less than 0.001). Heart rate and cardiac index rose from 77 to 93 beats/min and 2.47 to 3.48 l/min/m2, respectively (p less than 0.01). Mean blood pressure and systemic and pulmonary resistances fell from 107 to 92 mm Hg and 1704 to 1048 and 80 to 45 dyn s cm-5, respectively (p less than 0.01). Coronary vascular resistance also fell from 0.95 to 0.73 units (p less than 0.01). Mean atrial pacing time to angina rose from 142 to 241 s (p less than 0.05), while lactate production during rapid atrial pacing was decreased, lactate extraction ratio rising from -25 to -9% (p less than 0.05). These coronary and systemic vasodilator effects and the prolongation of pacing time to angina indicate an acute beneficial effect of prostacyclin on angina. Since prostacyclin has been shown to ...Continue Reading

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