Sleeping in the middle of the night heart is difficult mainly due to the following aspects: 1, coronary heart disease heart blood supply is insufficient, the patient may have risk factors, such as high blood pressure, high blood lipids, high blood sugar, smoking. Some patients do not have risk factors, but repeated episodes of heart attack at night, to do dynamic electrocardiography and cardiac ultrasound early to make a clear diagnosis. 2, reflux esophagitis is also prone to nighttime episodes of heart attack, some patients with symptoms similar to angina pectoris attack, especially some patients with a combination of acid reflux, heartburn and other symptoms, to do barium meal early to make clear the upper gastrointestinal tract. 3, nervousness, anxiety, etc., some patients Working life and learning too much pressure, mental overstress, poor sleep at night is also easy to appear in the heart, shift attention, often exercise to release the mental pressure to help relieve.