A rumbling murmur is a murmur produced by the rhythmic beating of the blood in the heart. Generally, no murmur is produced under physiologic conditions, and no murmur can be heard from any of the heart valves. Only when there are heart valve lesions and congenital heart disease, will hear a diastolic rumbling murmur, most commonly in mitral stenosis and other diseases. When this situation occurs, it is necessary to go to the hospital in time to improve the electrocardiogram, cardiac ultrasound and left heart catheterization test and other tests, to clarify the specific causes of the disease, and go to the hospital in a positive and timely manner to diagnose and treat the disease, in order to prevent the disease from progressing to the emergence of cardiac rupture, pulmonary arterial hypertension, cardiac dilatation, malignant cardiac arrhythmia and other diseases, which lead to panic, chest tightness, wheezing and paroxysmal dyspnea and other discomforts.