US Patent 7869871 Pacing therapy for diastolic heart failure

Described herein are methods and systems for delivering pacing therapy to HF patients who do not exhibit a reduced EF. Such patients do not have systolic dysfunction and generally do not benefit from established HF therapies that either augment contractile function or counteract conduction abnormalities. In one embodiment, a HF patient with a normal EF is tested for the adequacy of heart rate response during exercise. If the patient is found to be chronotropically incompetent, a rate-adaptive pacing mode is employed in order to improve functional capacity.