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pacemakers Flashcards

(54 cards)

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1
Q

codings system 5th letter

A

indicates multi site pacing

rarely used

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2
Q

what does an ICD do when it senses V-fib

A

defibrillate

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3
Q

good for people whose body cannot appropriately increase the HR during activity

A

rate responsive

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4
Q

___ requires shielding to prevent EMI

A

therapeutic radiation

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5
Q

___ system produces short pacemaker spikes

A

bipolar

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6
Q

temporary pacemaker are

A

transcutaneous

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7
Q

a series of small rapid electrical pacing pulses to interrupt V tach (by capturing the ventricle and breaking the re-entry circuit) and returning heart to the normal rhythm

A

anti-tachydysrhythmia pacing

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8
Q

sensors identify changes in the pt’s acitivity and adjust pacing to meet metabolic needs

A

rate responsive pacing

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9
Q

fast HR with a pacemaker spike preceding each QRS complex

A

pacemaker mediated tachycardia

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10
Q

sxs of bradycardia

A

syncope/ pre-syncope

dizzy

CHF

AMS

palpitations

SOB

exercise intolerance

relentless fatigue

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11
Q

50-60 Hz radio-frequency waves that interfere with pacemakers

A

electromagnetic interference

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12
Q

VVIR

A

ventricular inhibitory pacing with rate modulation

vent pacing

vent sensing

inhibits if vent activity sensed

rate mod active

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13
Q

types of pacing modes

which is most common

A

fixed rate

rate responsive

demand (most common)

lower/ upper rate limits

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14
Q

where do you look for atrial enlargement

A

V1 and lead 2

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15
Q

coding system 3rd letter

A

how the pacemaker responds to sensing

O = none

T= triggers pacing

I = inhibits pacing

D = dual (both triggers and inhibits)

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16
Q

coding system 2nd letter

A

the chamber being sensed by the pacemaker

0 = none

A = atrium

V = ventricle

D = dual

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17
Q

when is cardiac resynchronization therapy used

A

to resynchronize biventricular contraction

common in pts w/ HF

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18
Q

pacemaker spikes that fall where they should have been inhibited

A

failure to sense

the pacemaker doesn’t sense the intrinsic impulse and fires unnecessarily

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19
Q

which is more common, single chamber or dual chamber pacemakers

A

dual aka AV sequential chamber

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20
Q

3 indications for pacemakers

A

non-reversible

symptomatic

bradycardia

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21
Q

where should you first look for ischemia

A

precordial leads (V1-V6)- anterolateral heart

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22
Q

fires only when the pt’s intrinsic rate falls below a give threshold

Study These Flashcards
A

demand pacing mode

23
Q

can you do RF ablation

24
Q

permanent pacemakers used to tx

Study These Flashcards
A

symptomatic bradycardia

sick sinus syndrome

a-fib w/ bradycardia

3rd degree AV block

symptomatic 2nd degree type 2 AV block

AV block or BBB in pt w/ acute MI

resynchronization in heart failure

25
AAI
atrial inhibitory pacing, no rate modulation atrial pacing atrial sensing inhibits atrial pacing if atrial activity sensed
26
where do you look for BBB
V6 and lead 1
27
pacemaker spikes that are not followed by a P wave or broad QRS complex
failure to capture
28
logic circuits
part of permanent pacemaker that detects cardiac electrical activity and determines the appropriate response
29
only ICD permanent pacemakers are used in
V-fib V-tach (recurrent tachycardias)
30
DDI
dual chamber pacing without atrial synchronous vent pacing dual paced dual sensed inhibits vent pacing if vent activity sensed
31
what does an ICD do when it senses asystole
pace only
32
type of shocking that most pacemakers do
antibradycardia pacing
33
low or high energy shock (up to 35 joules) which is timed to the R waves to terminate VT and return heart to normal rhythm
cardioversion
34
coding system 1st letter
represents the heart chamber being paced 0 = none A = atrium V = ventricle D = dual
35
w/ a TENS units, \_\_\_ system is OK \_\_\_ system should be avoided
bipolar system is OK unipolar system should be avoided
36
\_\_\_ system produces talll pacemakers spikes
unipolar
37
ODO
pacemaker is off no pacing dual sensing no response to sensing (b/c not pacing)
38
what 3 things do ICDs do?
deliver paced beats cardiovert defibrillate
39
Cardiac Resynchronization Therapy leads (3)
* right atrium * right ventricle * coronary sinus (to pace the free wall of the L ventricle)
40
pacemakers do what 4 things
1. stimulate cardiac depolarization 2. sense intrinsic cardiac fxn 3. respond to increased metabolic demand by providing a rate responsive pacing 4. store diagnostic info to diagnose atrial/ vent arrhythmias
41
extracorporeal shock wave lithotripsy can cause EMI if
an abdominal device
42
VOO
**asynchronous ventricular pacing** ventricular pacing no sensing no response to sensing
43
what does an ICD do when it senses V tach
anti tachcardia pacing defibrillate
44
electraocautery can cause EMI if
within 6 inches of heart
45
high energy shock (up to 35 joules) to terminate ventricular fibrillation and return heart to normal rhythm
defibrillation
46
coding system letters 1-4 | (screw 5)
1. chamber being **paced** 2. chamber being **sensed** 3. how pacemaker **responds** to sensing 4. **rate responsive**?
47
failure to pace is also called
oversensing
48
do not withold ___ for fear of EMI
transthoracic defibrillation
49
absence of pacemaker spikes when the HR that is slower than the rate set for the pacemaker
failure to pace aka oversensing
50
DDDr
dual chamber pacing dual paced dual sensed dual response (inhibitory and triggered) rate mod active
51
can you do an MRI w/ a pacemaker
there are many compatible systems
52
permanent pacemakers are
implanted
53
where do you look for axis deviation
AVF and lead 1
54
coding system 4th letter
whether rate responsive feature is activated O = none R = rate responsive

EKG (8 decks)

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