The palpitations of lying down to sleep, but sitting up is fine mainly due to the following reasons: 1, recumbent angina, this patient’s disease is a special type of angina, due to the use of lying down position when the amount of return blood increased, the heart’s volume load increased, the heart needs to consume more oxygen when ejecting blood, and the patient itself due to the narrowing of the heart vessels caused by insufficient blood supply and oxygen supply, lying down position is particularly prone to induce angina, this 2, stomach disease, the most common is reflux esophagitis, due to lying stomach contents easily reflux to the esophagus, stimulating the esophagus can also appear similar performance, and the use of sitting position this reflux can effectively reduce. 3, psychological factors, such as staying up late, anxiety, lack of sleep and stress patients, also prone to similar performance, improve sleep, often exercise, etc., can help alleviate.