Typical angina pectoris is a clinical manifestation of retrosternal crushing chest pain or chest discomfort due to insufficient coronary artery blood supply and myocardial ischemia and hypoxia. In recent years, with the development of medical science, we often encounter patients who come to the clinic for chest discomfort, which indicates that people’s health awareness is increasing. However, myocardial ischemia can also appear as atypical “angina pectoris”, and there are several common types as follows. 1.Tightness in the throat Five years ago, a patient came to the emergency department after dinner complaining of tightness in the throat due to improper eating. Since he usually had high blood pressure for many years, the emergency department doctor did an electrocardiogram and found that there was a problem with the electrocardiogram and asked for a consultation. After looking at the ECG, the patient was told that acute right ventricular myocardial infarction was currently being considered and that he should be hospitalized for coronary angiography. The patient and his family were not convinced and insisted that it was due to food, with language mixed with all kinds of disdain and ridicule. After repeatedly stressing that you only live once, the patient began to consult his physician friend (non-cardiologist) by phone and still agreed to the angiography, which resulted in complete occlusion of the proximal right coronary and ventricular fibrillation several times during hospitalization, and was discharged from the hospital after about 2 weeks of recovery. 2. Episodic left upper extremity numbness A 43-year-old male, who had smoked for more than 20 years, had recurrent episodes of left upper extremity numbness and soreness lasting 3-5 minutes each time, and was found to have poor R-wave progression on ECG and 90% proximal stenosis of the anterior descending branch on angiography. 3. Nausea and vomiting A middle-aged male physician (non-cardiology) with recurrent nausea and vomiting with palpitations and chest tightness, who took morpholine and other drugs at home on his own, to no avail. It was aggravated when delayed for 3 hours, and came to the emergency department for electrocardiogram to find acute extensive anterior wall infarction, and the angiogram found complete occlusion of the proximal anterior descending branch. A 55-year-old male diabetic patient who had smoked for more than 30 years, 2 packs per day, had a sore jaw. In the past 2 weeks, he had episodes of jaw acidity and swelling lasting about 3 minutes each time with palpitations. The outpatient ECG was normal. An inpatient angiogram revealed 3 branch lesions and bypass was recommended.