We are doing this study in new cohorts of women and men with small vessel disease (a condition in which the small arteries in the heart become narrowed) and HFpEF (a condition with inadequate heart muscle function in the setting of preserved muscle pumping). We want to have better understanding of HFpEF for therapeutic strategy development and optimized noninvasive cardiac MRI for the diagnosis and management of Coronary Microvascular Dysfunction (CMD) and Heart Failure with Preserved Ejection Fraction (HFpEF).