Table 1.

Common differences between coronary spasm and chronic stable angina.

	Coronary spasm	Chronic stable angina
Frequency	Less	More frequent
Age	Younger	Older
Sex	Female	Male
Ethnicity	Japanese	No specific prevalence
Risk factors	Smoking, drug addiction, alcohol, hyperventilation, beta blockers	Classic cardiovascular risk factor
Circadian pattern	Night–early morning	No
Exertion/rest	Exertion/rest	Exertion
ECG	ST segment elevation	ST segment depression