If the patient appears to always want to inhale deeply, there are usually several categories of factors as follows:1. First, for patients with cardiac neurosis, there will be always wanting to inhale deeply when the vegetative nerve dysfunction, and the symptoms of discomfort in the precordial region will be relieved after inhalation.2. Second, for organic heart disease, the patient will also have such a situation, for example, patients appearing to have coronary arterial atherosclerotic heart disease of not Stable angina, myocarditis, pericarditis, infective endocarditis, hypertrophic obstructive heart disease or hypertensive heart disease, heart valve disease, rheumatic heart disease, there will be varying degrees of coronary artery ischemia, stenosis, spasm caused by lack of oxygen to the cardiac myocytes, and then the patient will always want to inhale deeply.3. Diseases of the respiratory system, for example, chronic bronchitis, chronic bronchiectasis, chronic Obstructive emphysema, chronic pulmonary heart disease, there will also always want to inhale deeply.