What is coronary heart disease, the symptoms?

Coronary heart disease is coronary atherosclerotic heart disease listed. Coronary heart of the human vascular nutrition, for various reasons arising from the vascular endothelium injury, lipid calm, vascular cavity becomes rough and narrow or blocked, leading to reduced blood flow, the heart can not get enough oxygen and nutrition, it would cause symptoms of varying severity. Due to the extent of lesions, the severity of the different collateral circulation or not, early or late differences, Therefore, the clinical coronary heart disease symptoms are varied. In China, the majority of patients with coronary atherosclerotic relatively mild, many patients do not even have any symptoms. This is known as the hidden coronary heart disease. A few patients to have "angina", or patients after heart sternum area before a strong sense of urgency, or have a strangulating pain. feeling more walking, biking, emotional, psychological stress, a meal, cold stimulation, Sometimes pain can be the reflection of the left shoulder or left hand, the mouth with nitroglycerin tablets or after taking a short rest will be eased. General duration of 1-2 minutes to 10 minutes, longer duration (more than half an hour), or rest. I can not nitroglycerin with ease, or to pallor, asthma, prostration, blood pressure dropped, it should suspicious of acute myocardial infarction, to be immediately sent for a doctor or a hospital for treatment. Some patients may appear arrhythmia or cardiac dysfunction, a very small number can cause sudden death But this is a situation in our countries than Europe and the United States less.