Clinical Research Directory

Inclusion Criteria: 1. Age 18-80 years, male or female; 2. Cardiology inpatients with suspected heart failure with preserved ejection fraction (cardiac ultrasound suggestive of LVEF ≥50% with at least 1 of the following: 1, left ventricular hypertrophy and/or left atrial enlargement; and 2, abnormal diastolic cardiac function); 3. Current or previous at least one symptom of heart failure, including dyspnea (including exertional dyspnea, nocturnal paroxysmal dyspnea, and telangiectasia), malaise, nausea, and bilateral lower extremity edema; 4. Voluntary participation and signed informed consent. Exclusion Criteria: 1. Acute heart failure or acute worsening of chronic heart failure; 2. Severe coronary stenosis (≥75% stenosis) without revascularization; 3. Patients who are unable to perform exercise stress echocardiography or have contraindications to the test; 4. are participating in other clinical trials; 5. Those with severe organic pathologies of the liver, kidney, or hematologic system or those with chronic diseases; 6. Those who are unable to follow the trial procedures; 7. Those who refuse to sign the informed consent.