Prognostic Values of Coronary Microvascular Dysfunction in Patients With Dilated Cardiomyopathy

Prognostic Values of Coronary Microvascular Dysfunction in Patients With Dilated Cardiomyopathy

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.

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