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a 63-year-old man always felt chest pain and tightness when he went to bed at night for the past month, but the patient was always reluctant to go to the hospital, always thinking that his condition would improve if he delayed. as a result, three days ago, the patient was suddenly awakened by severe chest pain while sleeping. the severe chest pain made him sweat profusely and his face pale. seeing that something was wrong, his family hurriedly called 120 for help.

fifteen minutes later, the patient was sent to the hospital's emergency department, where examination quickly confirmed he had acute myocardial infarction.

the doctor said that in the past month, the patient always had chest pain and chest tightness when sleeping at night. the culprit was variant angina, which is a type of spontaneous angina. in 1959, prinzmetal et al. named ischemic angina caused by coronary artery spasm as "variant angina", pointing out that the onset of this angina is not related to activity, the pain occurs at rest, the st segment of the electrocardiogram is elevated during the attack, and the st segment decreases after the attack, and no pathological q wave appears. variant angina can lead to acute myocardial infarction and severe arrhythmia, even ventricular fibrillation and sudden death.

if the patient had gone to the hospital for active examination and treatment when he first felt unwell, he could have avoided the serious consequences of acute myocardial infarction. what is even more regrettable is that this elderly patient died of the disease just six hours after being diagnosed with acute myocardial infarction.