Coronary heart disease patients will appear shortness of breath, mainly including two situations: 1, when coronary heart disease occurs myocardial ischemia, due to myocardial ischemia can lead to shortness of breath performance. 2, when coronary heart disease belongs to the ischemic cardiomyopathy, due to long-term myocardial ischemia caused by cardiac enlargement, the decline in myocardial contraction, the emergence of heart failure and lead to shortness of breath. So for shortness of breath in coronary heart disease, it depends on whether the shortness of breath is caused by myocardial ischemia or shortness of breath is caused by heart failure due to ischemic cardiomyopathy. If the shortness of breath is caused by myocardial ischemia in coronary artery disease, it should be actively given to improve myocardial ischemia treatment. For shortness of breath caused by ischemic cardiomyopathy leading to heart failure, it is necessary to actively give anti-heart failure treatment, but also to give secondary prevention of coronary heart disease treatment.