The randomized, double-blind, placebo-controlled, multi-center trial tested the hypothesis that intravenous estrogen followed by oral estrogen and the combination of intravenous and oral estrogen and progesterone in the routine management of unstable angina were beneficial compared with placebo in post-menopausal women. Subjects with rest angina and no contraindications to hormone therapy were randomized to receive intravenous followed by oral conjugated estrogen for 21 days, intravenous estrogen followed by oral conjugated estrogen plus medroxyprogesterone for 21 days or placebo. The primary end point was the number of ambulatory electrocardiographic ischemic events over the first 48 hours. Clinical events were also determined over six months of follow-up.