Does SMART need an atrial lead
YES
How long is a safety pacing window
100ms
What is the specificity and sensitivity of SMART
Sensitivity - 100%
Specificity - 94%
Is SMART beat to beat or rhythm based
Beat to Beat
How much does AF affect the SMART counter
-4
What are the 3 questions asked by SMART
What is the V & A rates?
Are the A and V stable
What is the relationship of A and V
Which rhythms minus the counter by 0.25?
ST or AT with antegrade conduction
Define STORRM
Stability Trend Onset Rate Regularity Multiplicity
What is the gang of four?
ICDs check the previous 3 beats or average of them.
What is stability fixed too when SMART is on
12%
Define Trend
PR intervals must be in strict increasing or decreasing order
What is onset fixed too when SMART is on
20%
How is rate calculated
Sliding averages of four PP and RR intervals
What is the AV regularity linked too and its value
Linked to stability - 1/2 thus value of 6%
What is multiplicity
Defined when the average ventricular rate is found to be a multiple of the average atrial interval
What happens when a VF interval occurs
VT counter freezes - SMART is not active in the VF zone
Defined forced termination timer
Applied SMART with re-detect only
Default is 1 minute - not programmable
All events are considered terminated and all therapy reset
What happens when noise is detected on atrial channel
SMART disabled - VT only detection used
