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Cardiovascular System > EKG primer > Flashcards

EKG primer Flashcards

1
Q

What does a P wave represent? T?QRS?

A

P: Atrial depolarization
QRS: Ventricle depolarization
T: Ventricle repolarization

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2
Q

What is a Q wave?

A

downward wave preceding an upward wave

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3
Q

What is a R wave?

A

Any upward wave

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4
Q

What is a S wave?

A

Downward wave following an R wave

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5
Q

What is a QS wave?

A

Downward wave with no upward wave at all.

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6
Q

What is the PR interval?

A

From beginning of atrial depolarization to beginning of ventricular depolarization

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7
Q

Discuss timing in EKG paper

A

One small block = .04s
A larger block = .2s
5 large blocks = 1s

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8
Q

What are the limb leads?

A

I, II, III, aVR, aVL, aVF

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9
Q

What are the precordial leads?

A

V1 and V2 are right precordial leads

V3, V4 and V5 are left precordial leads

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10
Q

Where is an isoelectric QRS usually found?

A

V3 and V4

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11
Q

What if an isoelectric QRS is found in V1 or V2?

A

Its called a rightward rotation or early precordial transition

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12
Q

What if an isoelectric QRS is found in V5 or V6?

A

Its called a leftward rotation or late precordial transition

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13
Q

Which lead should you measure?

A

The one with the longest duration

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14
Q

Differentiate a narrow QRS from a wide one.

A

Narrow: < .12s
Wide: > .12s

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15
Q

What does a first degree AV block look like on an EKG?

A
  1. Prolonged PR interval > .2s

2. Narrow QRS

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16
Q

What does a bundle branch block look like on an EKG?

A

Wide QRS > .12s

17
Q

What does right atrial hypertrophy look like?

A

Large diphasic P wave with tall initial component

18
Q

What does left atrial hypertrophy look like?

A

Large diphasic P wave with wide terminal component

19
Q

What is the significance of a Q wave that is more than a millimeter wide?

A

Significant Q wave; Necrosis

20
Q

T wave inversion?

A

Ischemia

21
Q

Hyperkalemia? Hypokalemia?

A

Wide QRS; Prominent U wave

22
Q

Hypercalcemia? Hypocalcemia?

A

Short QT; Prolonged QT

Cardiovascular System (33 decks)

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