HFpEF is characterized by abnormal diastolic function, which manifests as an increase in the stiffness of the heart's left ventricle and a decrease in left ventricular relaxation when filling with blood before the next beat.[4] There is an increased risk for atrial fibrillation and pulmonary hypertension. Risk factors for HFpEF include hypertension, hyperlipidemia, diabetes, smoking, and obstructive sleep apnea. There is a query about the relationship between diastolic heart failure and HFpEF.[5]