If a patient experiences chest tightness and shortness of breath after being angry, it is because the body stimulates the sympathetic nerves when it is obviously angry, which leads to an increase in sympathetic nerve tone, which will result in increased heart contraction, faster heart rate, increased post-oxygenation of the heart muscle, and the patient will also experience an increase in blood pressure. This leads to insufficient blood supply to the coronary arteries, and therefore, there is a decrease in the oxygen supply and blood supply to the cardiac muscle cells, which can lead to chest tightness and shortness of breath. In addition, obvious anger activates the renin-angiotensin-aldosterone system in the body, causing an increase in aldosterone secretion, which will further increase blood pressure, increase myocardial contractility, and increase the load on the heart, which will also cause chest tightness and shortness of breath. At the same time, severe anger can also cause dysregulation of the neurohumoral-endocrine system in the body, which can aggravate the above symptoms.