What is coronary heart disease, and is it dangerous?

Coronary heart disease is relatively dangerous. After the onset of the disease, patients may experience blockage and narrowing of blood vessels. Coronary artery spasm can lead to myocardial ischemia and hypoxia, and even result in heart disease due to tissue necrosis. Severe environmental pollution and high noise levels in daily life may contribute to the development of coronary heart disease. The condition is quite serious and must be actively treated. Patients should also follow a low-fat, low-salt diet and avoid various triggering factors.