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EKG > The basics pt 1 & 2 > Flashcards

The basics pt 1 & 2 Flashcards

1
Q

What does an EKG tell? (5)

A
  • The STRUCTURE of the heart - Hypertrophy, Ischemia/Infarction
  • The RATE and RHYTHM
  • The ELECTRICITY
  • The PLUMBING
  • The TOXIC EFFECTS of meds
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2
Q

Cons of EKG

A
  • Artifact
  • Interpretation error
  • Performance error
  • Small snapshot
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3
Q

What is recorded on an EKG tracing is the process of electricity traveling through the heart

A
  • Depolarization
  • Repolarization
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4
Q

3 types of Cells that make up the electrical system of the heart

A
  • Pacemaker/SA node
  • Conduction pathway
  • Myocardial cells
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5
Q

Which axis on the EKG measures time?

A

X axis

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6
Q

how much time does one small square in an EKG represent? how much is one big/whole square?

A

0.04 seconds
0.2 seconds

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7
Q

how much voltage does one small square present? how much is a large square represent then?

A

0.1 mV
0.5 mV

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8
Q

which part of the QRS wave is the first negative deflection

A

Q

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9
Q

which part of the QRS wave is always positive and above the baseline

A

R

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10
Q

which part of the QRS wave is the negative deflection after the positive segment?

A

S

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11
Q

a depolarization moving toward an electrode would result in what deflection?

A

positive

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12
Q

a depolarization moving away from the electrode would result in what deflection?

A

negative

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13
Q

repolarization moving toward an electrode what result in what deflection?

A

negative

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14
Q

repolarization moving away from an electrode would result in what deflection?

A

positive

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15
Q

the 12 views of the heart are made up of 6 limb leads and 6 precordial (chest) leads
what are they?

A
  1. limb leads - lie in the frontal plan - I, II, III, aVF, aVL, aVR
  2. precordial leads - lie in horizontal plane - V1, V2, V3, V4, V5, V6
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16
Q

what are the anterior leads

A
  • V2
  • V3
  • V4
17
Q

what are the lateral leads

A
  • I
  • aVL
  • V5
  • V6
18
Q

what are the inferior leads?

A
  • II
  • III
  • aVF
19
Q

what are the right-sided leads

A
  • aVR
  • V1
20
Q

what are the septal leads?

A
  • V2
  • V3
21
Q

what are the two phases of QRS complex

A
  1. septal depolarization
  2. ventricular depolarization
22
Q

which phase of the QRS complex
* Smaller amplitude; not always visible on EKG
* Mean vector travels LEFT to RIGHT
* Appears either as small Q wave in lateral leads or small R wave in right-sided leads

A

septal depolarization

23
Q

which phase of the QRS complex
* Creates large amplitude wave
* Mean vector travels from RIGHT to LEFT (towards apex)
* Appears as large R wave in left leads and large S wave in right leads

A

ventricular depolarization

EKG (7 decks)

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