X Syndrome

Microvascular angina, or "X" syndrome, refers to those with typical symptoms of exertional angina or positive electrocardiogram exercise tests, normal coronary angiography, and those with coronary spasm need to be excluded. "X syndrome" is also known as "microvascular angina pectoris", and its possible pathogenesis is due to abnormalities in the structure and function of microvasculature of the coronary arteries smaller than 200 microns and its microcirculation. In the process of understanding and diagnosing the above concepts, we must avoid guessing, subjective reasoning, and partial generalizations; we should focus on objective evidence and comprehensive evaluation; we must carry out strict diagnosis and deal with leniency. That is, don't easily put on a "coronary heart disease" hat without sufficient evidence, and use appropriate preventive treatment to reduce risk. It has symptoms of exertional angina pectoris or angina-like discomfort, active plate ECG exercise test has evidence of myocardial ischemia such as ST segment depression, and coronary angiography (CAG) shows a group of clinical syndromes with normal or non-obstructive changes in the coronary arteries. Likoff first reported in 1967 that Kenp called it X syndrome in 1973. Recently Cannon et al. Proposed to call it microvascular angina pectoris (CMSA). As for physical weakness, shortness of breath, and other symptoms, there are many reasons, and you should go to a qualified hospital to see a major internal medicine. Diagnose clearly before standardizing prevention.