JapanSummary: Prinzmetal's variant angina occurred in a 52-year-old man 10-1 1 h after the ingestion of alcohol, when blood levels of alcohol decreased almost to the zero level. Coronary arteriograms revealed significant narrowing in the left circumflex artery and the left anterior descending artery and minimal wall irregularity in the right coronary artery; however, both exercise and pharmacologic stress tests were negative. A withdrawal from an acute exposure to alcohol was discussed as a possible causative mechanism of the alcoholinduced Prinzmetal's variant angina in this case.

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SUMMARYFrequent tracings of ECG during attacks of the nocturnal angina pectoris of a 69-year-old man failed to show any evidence of angina pectoris electrocardiographically. Angina pectoris was, however, induced by an intravenous administration of 50% glucose unexpectedly, and relieved by sublingual nitroglycerin and oxygen inhalation. The mechanism of this unusual phenomenon was discussed in relation to the serum-potassium, plasma-insulin, and the spasm of the coronary artery.

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