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RCES RETEST- FINAL > Electrophysiology Building Blocks > Flashcards

Electrophysiology Building Blocks Flashcards

1
Q

Depolarization is what of the cardiac muscles?

A

Contraction

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2
Q

Depolarization is what of the cardiac muscles?

A

contraction

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3
Q

During action potential the movement is from ____ concentration to ____ concentration.

A

High, Low

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4
Q

The inside of the cell has a negative or positive charge compared to the outside of the cell.

A

Negative

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5
Q

Which ions are concentrated inside the cell?

A

K+

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6
Q

What ions are concentrated outside the cell?

A

NA+ and Ca++

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7
Q

Responsible for rapid depolarization

A

Sodium channels

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8
Q

Responsible for repolarization

A

Potassium channel

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9
Q

What are the two types of calcium channels?

A

L- Type and T- Type

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10
Q

What is the purpose of L- Type Calcium Channels?

A

Contributes to contraction

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11
Q

What is the purpose of T-Type Calcium Channels?

A

Plays a significant role in automaticity and impulse conduction

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12
Q

What is the starting membrane potential fo a cardiac cell?

A

-90 mv

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13
Q

What happens in phase 0?

A

Sodium channels open allowing sodium ions to rush into the cell

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14
Q

What happens in phase 1?

A

Sodium channels close which ends the influx of sodium into the cell, the potassium ions begin to flow out of the cell

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15
Q

What phase marks the onset of repolarization?

A

Phase 1

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16
Q

What phase initiates depolarization?

A

Phase 0

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17
Q

What phase is know as the plateau phase?

A

Phase 2

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18
Q

What happens in phase 2?

A

Calcium channels open and allow the influx of calcium ions into the cell.

19
Q

What phase is known as the absolute refractory period?

A

Phase 2

20
Q

What happens in phase 3?

A

The calcium channels close and the potassium ions continue to exit the cell. The sodium potassium pump pushes NA out of the cell and pulls K+ ions back into the cell at a 3 Na: 1K

21
Q

In what phase is depolarization complete?

A

Phase 3

22
Q

What phase is also known as the Quiescent period?

A

Phase 4

23
Q

What happens in phase 4?

A

The cell returns to its resting membrane of -90 mV and the distribution of the Na+ and K+ is restored and the cell can now be depolarized again

24
Q

What phase is the resting membrane potential?

A

Phase 4

25
Q

How are electrodes on catheters arranged?

A

Smallest number is the most vital where the largest number is the most proximal

26
Q

What is the high/low filter for surface leads?

A

.5/ 100 Hz

27
Q

What is the high/low filter for EGM’s?

A

30/500 Hz

28
Q

What is the recording speed for EGMs?

A

100-200 mm/s

29
Q

What is the most common catheter position for an initial EP study?

A

HRA, HIS, RVA, CS

30
Q

What kind of catheter is the HRA?

A

Quadrapolar

31
Q

What kind of catheter is the HIS?

A

Quadrapolar, Hexapolar, or Octapolar

32
Q

What kind of catheter is the RVA?

A

Quadrapolar

33
Q

What kind of catheter is the CS?

A

Deca-polar

34
Q

Where are the A spikes displayed?

A

HRA and HIS

35
Q

Where are H spikes displayed

A

HIS

36
Q

Where are the V spikes displayed

A

HIS, CS, RVA

37
Q

Signals that are sharp are considered?

A

Near field

38
Q

Signals that are wide and dull are considered?

A

Fall field

39
Q

PA interval normal value?

A

25-55 ms

40
Q

AH interval normal value?

A

50-120 ms

41
Q

HV interval normal value?

A

35-55 ms

42
Q

What is Ohms Law?

A

V= IR, I=V/R, R= V/I

43
Q

How to convert Kg to Lbs?

A

Kg(2.2)= Lbs

44
Q

How to convert Lbs to Kg?

A

Lbs/2.2 = Kg

RCES RETEST- FINAL (21 decks)

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