Coronary heart disease feeling chest tightness, shortness of breath may be life threatening. Coronary atherosclerotic heart disease (coronary heart disease) is a common cardiovascular emergency, clinical diagnosis of coronary heart disease, if the chest tightness, shortness of breath, chest pain, palpitations (their own subjective feeling of a faster heartbeat, often accompanied by panic) and so on, can not be ruled out again myocardial infarction or coronary heart disease leading to the possibility of heart failure; if it is again myocardial infarction can make the patient cardiac vascular acute ischemia and hypoxia, severe Even sudden cardiac death; and acute heart failure may also jeopardize the patient’s life. Combined with the above, coronary heart disease patients sudden chest tightness and shortness of breath can not be excluded again myocardial infarction or heart failure and other conditions, serious cases can endanger the patient’s life, need to go to the regular hospital to consult the diagnosis, if necessary, you can first take fast-acting heart pills or sublingual nitroglycerin, so as to avoid delaying the condition.