Patent ID: 6968232

Claim:
In an implantable cardiac stimulation device for implant within a patient having a controller for controlling functions of the cardiac stimulation device, a method comprising: determining whether the patient is prone to rest-related physiologic problems; determining whether the patient is at rest; and controlling selected functions of the cardiac stimulation device based on a first set of parameters while the patient is at rest and a second set of parameters while the patient is not at rest, with sets of parameters specifying one or more of AV/PV delay, refractory period, overdrive pacing parameters, diagnostic-data gathering parameters and defibrillation capacitor charging parameters; wherein the controller further employs a set of vagally-mediated arrhythmia (VMA) rest-mode control parameters and further comprising; detecting whether the patient is prone to vagally-mediated arrhythmias; and while the patient is at rest, controlling selected functions of the cardiac stimulation device using the VMA rest-mode control parameters if the patient is prone to vagally-mediated arrhythmias and using the first set of parameters if the patient is not prone to prone to vagally-mediated arrhythmias.