SMART

Question 1

Does SMART need an atrial lead

Answer 1

YES

Question 2

How long is a safety pacing window

Answer 2

100ms

Question 3

What is the specificity and sensitivity of SMART

Answer 3

Sensitivity - 100%

Specificity - 94%

Question 4

Is SMART beat to beat or rhythm based

Answer 4

Beat to Beat

Question 5

How much does AF affect the SMART counter

Answer 5

-4

Question 6

What are the 3 questions asked by SMART

Answer 6

What is the V & A rates?

Are the A and V stable

What is the relationship of A and V

Question 7

Which rhythms minus the counter by 0.25?

Answer 7

ST or AT with antegrade conduction

Question 8

Define STORRM

Answer 8

Stability 
Trend 
Onset 
Rate 
Regularity 
Multiplicity

Question 9

What is the gang of four?

Answer 9

ICDs check the previous 3 beats or average of them.

Question 10

What is stability fixed too when SMART is on

Answer 10

12%

Question 11

Define Trend

Answer 11

PR intervals must be in strict increasing or decreasing order

Question 12

What is onset fixed too when SMART is on

Answer 12

20%

Question 13

How is rate calculated

Answer 13

Sliding averages of four PP and RR intervals

Question 14

What is the AV regularity linked too and its value

Answer 14

Linked to stability - 1/2 thus value of 6%

Question 15

What is multiplicity

Answer 15

Defined when the average ventricular rate is found to be a multiple of the average atrial interval

Question 16

What happens when a VF interval occurs

Answer 16

VT counter freezes - SMART is not active in the VF zone

Question 17

Defined forced termination timer

Answer 17

Applied SMART with re-detect only

Default is 1 minute - not programmable

All events are considered terminated and all therapy reset

Question 18

What happens when noise is detected on atrial channel

Answer 18

SMART disabled - VT only detection used