Haemodynamic and metabolic effects of dazoxiben at rest and during atrial pacing.

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Abstract
1 Thromboxane B2 (TXB2) levels were measured in three sites (coronary sinus, pulmonary artery, and femoral artery) at rest and during atrial pacing in 11 patients with stable angina pectoris. 2 There was a highly significant increase in arterial TXB2 on pacing (by up to 820 pg/ml) but there was no change in the thromboxane levels at the other two sites. 3 Dazoxiben 200 mg orally abolished the increase in arterial TXB2, but had no effect on systemic, pulmonary or coronary haemodynamics, no effect on myocardial metabolism and a variable effect on atrial pacing time to angina.