Symptoms of palpitations include panic, chest tightness, chest pain, etc. The causes include tachyarrhythmia, anemia, hyperthyroidism, and so on. Palpitation is often accompanied by accelerated heart rate, and patients may have symptoms of panic, chest tightness and chest pain, which may be related to myocardial ischemic attack caused by accelerated heart rate, and the common causes are as follows: 1. Tachyarrhythmia: tachyarrhythmia will increase myocardial oxygen consumption, resulting in myocardial ischemic attack, palpitations is a common symptom, common diseases are frequent atrial premature, paroxysmal supraventricular tachycardia and so on. 2. anemia: anemia patients due to the reduction of hemoglobin and blood cells, resulting in a decrease in blood oxygenation of the blood, will reflexively appear to accelerate the heart rate, manifested as palpitations of the symptoms. 3. Hyperthyroidism: Increased secretion of thyroid hormone will lead to faster heart rate, and patients can show symptoms of palpitations. There are many other reasons for palpitation in clinic, different patients have different performances, and if the symptoms are obvious, we should go to the hospital in time, and make clear diagnosis and active treatment under the guidance of physicians.