Heart gripping difficulty may be caused by aortic valve stenosis, arrhythmia, cardiac neurosis, coronary heart disease and other causes, the specific causes still need to go to the hospital to determine the examination. 1. Aortic valve stenosis: aortic valve stenosis is generally caused by congenital malformation, degenerative changes in old age, etc. When the valve stenosis is severe, patients will have dyspnea, mostly exertional dyspnea, paroxysmal nocturnal dyspnea, and angina pectoris, which is often seen after exercise, and patients will also have fainting and blackout symptoms. 2. Arrhythmia: Arrhythmia is usually caused by chest surgery, cardiovascular diseases, electrolyte disorders, etc. Patients will have symptoms of weakness, palpitation and sweating in the early stage, and with the development of the disease, patients will have symptoms of chest tightness, shortness of breath, dizziness, etc. Patients with serious conditions will also have sudden death. 3. Cardiac neurosis: cardiac neurosis is generally caused by heredity, life stress and other reasons, the most common symptom of this disease is palpitations, mostly in sports, emotional excitement is more pronounced, the patient will also appear dyspnea, precordial pain, insomnia, dreamy, tinnitus and sweating, loss of appetite and other symptoms. 4. Coronary heart disease: coronary heart disease is generally caused by obesity, overweight, dyslipidemia and other reasons, some patients early in heavy physical labor or strenuous exercise will appear after angina pectoris symptoms, with the development of the disease, the patient’s chest will also appear tightness or pressure, and accompanied by shortness of breath, heart failure, palpitations, fatigue and other symptoms. There are many reasons why the heart pulls hard, if there are symptoms should be timely to the hospital for medical treatment, after diagnosis under the guidance of the doctor for treatment.