Yet a further feature of the invention is to provide an implantable antitachycardia device that automatically adjusts its detection rate zone, e.g., by automatically adjusting the lower and upper limits of such rate zone, as a function of a sensed physiologic parameter of the patient, such a physical activity, which {HEAD ~ physiologic parameter} provides {TAIL ~ an indication} whether the sinus heart rate is expected to change 
provides
Yet a further feature of the invention is to provide an implantable antitachycardia device that automatically adjusts its detection rate zone , e.g. , by automatically adjusting the lower and upper limits of such rate zone , as a function of a sensed physiologic parameter of the patient , such a physical activity , which { HEAD ~ physiologic parameter } provides { TAIL ~ an indication } whether the sinus heart rate is expected to change
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