Patients feel difficulty in breathing, rapid heartbeat and panic, most of them are caused by heart diseases, there are coronary heart disease, acute myocardial infarction, congenital heart disease, pericardial effusion, left heart failure are very easy to cause this symptom, in the presence of hypertension is also a certain effect. You need to go to the hospital first for an examination, mainly an electrocardiogram and a cardiac ultrasound. If the above-mentioned conditions are excluded, it is also necessary to consider that the symptoms are caused by respiratory system diseases, such as spontaneous pneumothorax, acute pneumonia, respiratory failure, which can easily occur.