What causes chest tightness and palpitation?

The symptoms of chest distress and palpitation may be caused by cardiac diseases, such as myocardial ischemia, angina pectoris, heart failure, acute myocardial infarction, etc.; secondly, it may be pneumonia, bronchitis, chronic obstructive pulmonary disease and other respiratory diseases, resulting in chest distress, palpitation, dyspnea and other symptoms; it may also be the imbalance of body fluid metabolism and acid-base balance of the patient, thus causing the above symptoms. It is suggested that patients whose symptoms cannot be relieved for a long time should seek medical examination as soon as possible. Antibiotics and other drugs can be used for confirmed pneumonia; nitrates can be used for intervention for confirmed myocardial ischemia.