Enhanced External Counterpulsation to Treat Long COVID-19 Fatigue

Inclusion Criteria: * Patients recovering from PCR or lateral flow testing proven acute COVID-19 * 3-12 months following the acute infection * Suffering from fatigue with a PROMIS-SF-7a T-score of \> 50 Exclusion Criteria: * Acute decompensated heart failure * Recent myocardial infarction within the last 3 months * Unstable angina pectoris * Severe hypertension \> 180/110 mm Hg * Coagulopathy with international normalized ratio of prothrombin time \> 2.0 * Moderate to severe aortic regurgitation * Abdominal aortic aneurysm (\>5 mm) or dissection * Arrhythmias that may interfere with triggering of EECP system (uncontrolled atrial fibrillation, flutter and very frequent premature ventricular contractions) * Heart rate of \<35 or \>125 beats per minute * Any surgical intervention within 6 weeks before EECP * Recent cardiac catheterization (1-2 weeks) or arterial femoral puncture * Severe peripheral arterial disease * Severe venous disease (thrombophlebitis, prior or current deep vein thrombosis or pulmonary embolism) * Severe chronic obstructive pulmonary disease * Pregnancy or women of childbearing age who do not have a negative pregnancy test