The goal of this observational study is to learn about the long-term prognostic of coronary microvascular dysfuction in Patients with Dilated Cardiomyopathy.
The main question it aims to answer is: Does the coronary microvascular dysfunction impact the outcomes in Patients with Dilated Cardiomyopathy.
Dilated cardiomyopathy comfirmed by echocardiography: LVDd > 55 mm in men or > 50 mm in women.
Clinically evident congestive heart failure: Compatible symptoms and signs, and BNP ≥ 35 pg/mL or NT-proBNP ≥ 125 pg/mL, and LV systolic dysfunction defined by LVEF < 45 %.
Coronary angiography showing stenosis ≤ 50 % in all major epicardial vessels.
Patients with coronary artery disease, hypertensive heart disease, rheumatic valvular heart disease, myocarditis, and other secondary cardiomyopathies.
poor angiographic image quality