Clinical medicine review: three unique presentations of ischemic heart disease.

Unstable angina pectoris, Prinzmetal variant angina, and ischemic heart disease with normal coronary arteries, are three unique syndromes of ischemic heart disease that have recently become better understood. With the recognition of their manifestations, the combination of modern medical techniques and collaborative epidemiological studies should eventually lead to their early diagnosis, optimal treatment, and possible prevention.