blanking period
A programmed interval during which the device ignores electrical signals to prevent inappropriate sensing.
Full Definition
The blanking period is a brief, programmable time window immediately following a paced or sensed event during which the cardiac device's sensing circuits are temporarily disabled. This prevents the device from inappropriately detecting electrical artifacts, lead polarization, or T-wave oversensing that could trigger unwanted responses. Different blanking periods apply to atrial and ventricular channels, and modern devices often feature dynamic or adaptive blanking that adjusts based on patient physiology. Proper blanking period programming is crucial for optimal device function and preventing both oversensing and undersensing complications.
In Context
- "The ventricular blanking period was extended to prevent T-wave oversensing." — Device programming note
- "Modern ICDs feature adaptive blanking periods that optimize sensing performance." — Technical specification