| 摘要 |
An implantable medical device includes a lead configured to be located proximate to the left ventricle (LV) of the heart, the lead including multiple LV electrodes to sense cardiac activity at multiple LV sensing sites. The a detection module to detect an arrhythmia that represents at least one of a tachycardia and fibrillation based at least in part on the cardiac activity sensed at the multiple LV sensing sites. The ATP therapy module to identify at least one of an ATP configuration or an ATP therapy site based on the cardiac sensed activity at the LV sensing sites, the ATP therapy module to control delivery of antitachycardia pacing (ATP) therapy at the ATP therapy site. The ATP therapy module delivers a stimulus to electrodes at one or more of an LV site, right ventricular (RV) site and right atrial (RA) site, the detection module to sense evoked responses at the LV sensing sites, the ATP therapy module to designate the ATP therapy site to include at least the LV sensing site with a shortest activation time relative to the one or more LV site, RV site and RA site where the stimulus is delivered.
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