Distribution and Clinical Implication of Coronary Flow Reserve and Index of Microcirculatory Resistance in Patients With Heart Failure With Preserved Ejection Fraction Without Significant Coronary Artery Disease
To evaluate the incidence of coronary microvascular dysfunction (CMD) and its' prognostic implication in patients who have diagnosed as heart failure with preserved ejection fraction (HFpEF) confirmed by HFA-PEFF scoring system without functionally significant coronary artery disease.
• Subject must be at least 19 years of age.
• Subject with preserved ejection fraction (ejection fraction \> 50%)
• Subject presented with dyspnea on exertion (NYHA Grade 2 or more) and diagnosed as HFpEF using HFA-PEFF scoring system (HFA-PEFF ≥5 or 2-4 with abnormal stress test or invasive hemodynamic test)
• Subject who clinically need coronary angiography
• Subject who is able to voluntarily sign informed consent form