Overview

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.

Eligibility

Inclusion Criteria:

• 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.

Exclusion Criteria:

• Patients with coronary artery disease, hypertensive heart disease, rheumatic valvular heart disease, myocarditis, and other secondary cardiomyopathies.
• poor angiographic image quality