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Flashcards in Exam questions Deck (27):
1

How would you reduce safety pacing // functional non sensing in patient with frequent ectopy

Shorten ventricular blanking period

2

Which component takes negative and positive signals and turns them into one signal

Rectifier

3

Whats the most common cause of mode switching

Lead insulation break

4

What does intention to treat mean

Randomised to groups regardless of whether the complied with treatment given

5

ICD charge delivered is the relationship between _______

Initial voltage vs. final voltage on capacitor

6

Whats normal EF

50-65%

7

What rate modulation sensor requires a special lead

Temperature

8

Resistance heart must overcome to eject blood is known as ______

After load = Systemic Vascular resistance

Preload = Stretch during filling, ready to pump

9

Pre/After load = Systolic BP

Afterload

10

Dispensability (Pressure) x Volume =

Compliance

11

How much does stroke volume increase in a normal person during exercise

50%

12

Capture hysteresis is AKA

Wedensky effect

13

How are capacitors charged and discharged

Charged in parallel

Discharged in series

14

Current describes battery capacity TRUE/FALSE

TRUE

15

The strength above which VF is no longer inducible describes WHAT

ULV = Upper limit of vulnerability

16

How do DR ICD's prevent far field ventricular over sensing

Short intra-electrode spacing

17

What are ICD batteries made from

Lithium Silver vanadium oxide

18

What is the incidence of pocked infection

<2%

19

Most common ACUTE infection

Staph AUREUS

20

Overdrive pacing is preventative for what

Torsades

21

The bear dropping theory was proven by what trial

CAST

22

Anti arrhythmic suppression of frequent PVCs >10/hr was dangerous and is called what theory

Bear dropping theory

23

Define a PVC in DDD

Any V event without a preceding sensed A event

24

RV apex pacing is what in inferior leads

Negative

25

RVOT pacing is what in inferior leads

Positive

26

If you leave time in msec for threshold calculations - your answer is in what unit

uJ

27

What is quiescent current

Housekeeping current - monitoring and logging stuff