Mintek LV-T Manual Do Utilizador

Stratos LV/LV-T Technical Manual  81 

The ventricular blanking time is the period after an atrial pacing 
pulse during which ventricular sensing is deactivated.  It is 
intended to prevent ventricular sensing of the atrial pacing pulse 
(“crosstalk”). 

The blanking time shall be as short as possible in order to 
provide ventricular sensing when a ventricular depolarization 
could occur.  

Crosstalk may be encountered if a shorter blanking time, 
unipolar ventricular sensing, a higher ventricular sensitivity 
(lower value) and/or a high atrial pulse amplitude and pulse 
width are programmed. 

Values between 30 ms and 70ms (30… (10) …70 ms) can be 
set for the ventricular blanking period.  The value should be set 
as low as possible and yet high enough to ensure ventricular 
sensing.  

However, it must be programmed to ensure atrial pacing is not 
sensed in the ventricle. 

The safety AV delay (set at 100 ms) applies to all dual chamber 
pacing modes 

To prevent ventricular pulse inhibition in the presence of 
crosstalk, a ventricular pulse will be emitted at the end of the 
safety AV delay (

).  When pacing is AV sequential at the 

pre-set safety AV delay, the presence of crosstalk should be 
considered and appropriate reprogramming performed (lengthen 
the ventricular blanking time, lower ventricular sensitivity, bipolar 
configuration, and/or lower atrial pulse energy).