The early symptoms of coronary heart disease primarily appear as exertional angina, manifesting as chest pain during physical activity or emotional agitation. The pain is located behind the sternum and may radiate to the precordial area, feeling oppressive or accompanied by a tightening sensation. The chest pain generally lasts from several minutes to more than ten minutes, most often between three to five minutes, and can be quickly relieved by rest. Of course, some individuals do not exhibit clear symptoms of chest pain, but rather symptoms like chest tightness and palpitations. Once patients with coronary heart disease experience exertional angina, it is vital to promptly visit a hospital for comprehensive examinations such as electrocardiograms, exercise tests, cardiac echocardiography, and if necessary, coronary angiography to confirm the diagnosis and commence treatment as soon as possible.