A Study of the Effect of Exercise on Cardiac Hemodynamics After Adjusting Atrial-Ventricular and Interventricular Timing Delays in Patients with a CRT (Cardiac Resynchronization Therapy) Device
About this study
The purpose of this study is to determine the resuts of adjusting atrial-ventricular (AV) and interventricular (VV) timing delays on cardiac hemodynamics at rest and during exercise for patients who have a CRT (cardiac resynchronization therapy) device. Most current attempts to optimize CRT are done under resting conditions and patients report symptoms during mild daily exercise.
Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. If you need assistance understanding the eligibility criteria, please contact the study team.See eligibility criteria
- Heart failure patients
- Either already have a CRT device (≤ 3 mo.) or are undergoing clinically indicated CRT device implantation
- Ages 30-80 years
- Are able to perform very light exercise without orthopedic limitations
- Not morbidly obese (BMI>38)
- Not able to perform light exercise with orthopedic limitations (and not morbidity obese)
Participating Mayo Clinic locations
Study statuses change often. Please contact us for help.
|Mayo Clinic Location
Mayo Clinic principal investigator
Bruce Johnson, Ph.D.
Closed for enrollment