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Medication Revision > ECG’s > Flashcards

ECG’s Flashcards

1
Q

What do the ECG waves indicate?

A

P- atrial depolarisation
QRS-depolarisation of ventricles
T- ventricular repolarisation

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2
Q

What should the PR and QRS intervals be?

A

PR- 120-200ms
QRS- <110ms

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3
Q

What can absent p waves mean?

A

AF or atrial flutter

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4
Q

How to calculate rate?

A

300/squares between QRS complexes

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5
Q

Describe left axis deviation?

A

Positive deflection in lead 1. Negative QRS, deflection in leads 2,3 and AVF

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6
Q

Describe right axis deviation?

A

Negative deflection in lead 1 and positive QRS deflection in leads 2,3 and AVF

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7
Q

What can tall QRS complexes mean?

A

Ventricular hypertrophy

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8
Q

What can wide QRS complexes mean?

A

Ventricular tachycardia, BBB and premature ventricular contraction

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9
Q

Describe ECG criteria for tachycardia and bradycardia?

A

Tachy= >100bpm
Brady= <60bpm

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10
Q

Describe AF criteria?

A

Irregularly irregular. No p waves. QRS<120ms. Baseline fibrillates.

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11
Q

Describe atrial flutter criteria?

A

Sawtooth p waves. QRS<120ms. No baseline seen

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12
Q

Describe STEMI ECG criteria?

A

> 1mm elevation in >2 contiguous leads. Reciprocal changes in other views

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13
Q

What is v4r?

A

In an inferior stemi, right ventricular infarction is common. To determine right ventricular involvement, move v4 to mirrored side of chest. Can be associated with hypotension due to right ventricles not pumping adequately.

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14
Q

How can you confirm a posterior stemi?

A

Place v7,8 and 9.
V7= left posterior axillary line, same level as v6.
V8= Tip of left scapula, same level as v7
V9= left side of spine, same level as v8

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15
Q

What is an NSTEMI?

A

Subendocardial infraction. Will appear as ST depression/T wave inversion

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16
Q

Describe heart block criteria?

A

1st= PR interval>200ms
Wenchebach= longer and longer PR interval until a QRS is dropped and process repeats.
Mobitz2= PR interval constant, QRS, complex is intermittently dropped.
3rd= P waves and QRS completely disassociated from each other and each have own separate and regular rhythms.

17
Q

Describe LBBB and RBBB?

A

RBBB= QRS>120ms. Bunny ears in v1-v3. Wide and slurred S waves in lateral leads. ST depression/ T wave inversion in v1-3.
LBBB= QRS>120ms. QRS negative in v1. B-road positive QRS in lateral leads. No Q waves in lateral leads.

Medication Revision (6 decks)

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