AUTOMATIC THRESHOLD SENSITIVITY ADJUSTMENT FOR CARDIAC RHYTHM MANAGEMENT DEVICES

摘要

An implanting cardiac rhythm management device (10) includes a controller (28) adapted to receive digitized electrocardiogram signals from leads (14) placed on or in the heart, and incorporates an auto-sense algorithm which automatically adjusts the sensing threshold dependent upon an average or maximum amplitude of noise detected during a period following a sensed cardiac depolarization. The sensing threshold is automatically set on a beat to beat basis at a level such that the signal to noise ratio exceeds a preset value.