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Cardiology > Heart Block > Flashcards

Heart Block Flashcards

1
Q

What is bundle branch block?

A

A block in the conduction of one of the bundle branches, so the ventricles don’t receive impulses at the same time

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2
Q

What does right bundle branch block look like on an ECG?

A

MaRRoW (R wave in V1, Slurred S wave in V6), Wide QRS

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3
Q

What does left bundle branch block look like on an ECG?

A

WiLLiaM (Slurred S wave in V1, R wave in V6), Wide QRS, notched top, T wave inversion in lateral leads

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4
Q

What can cause RBBB?

A

PE, IHD, atrial ventricular septal defect

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5
Q

How does RBBB present?

A

Asymptomatic, syncope/presyncope

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6
Q

How do you manage RBBB?

A

Pacemaker, cardiac resynchronisation therapy, reduce blood pressure

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7
Q

What can cause LBBB?

A

IHD, aortic valve disease

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8
Q

How does LBBB present?

A

Asymptomatic, syncope/presyncope

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9
Q

How do you manage LBBB?

A

Pacemaker, cardiac resynchronisation therapy, reduce blood pressure

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10
Q

What is heart block?

A

A block at any level of the conduction system in which conduction seizes

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11
Q

What does 1st degree heart block look like on an ECG?

A

PR interval >200ms

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12
Q

How does 1st degree heart block present?

A

Asymptomatic

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13
Q

What does 2nd degree heart block Mobitz I look like on an ECG?

A

Progressive lengthening of PR interval, one non-conducted P wave, next PR interval is shorter

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14
Q

How does 2nd degree heart block Mobitz I present?

A

Light headedness, dizziness, syncope

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15
Q

What does 2nd degree heart block Mobitz II look like on an ECG?

A

Constant PR, occasional non-conducted P waves, wide QRS

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16
Q

What does 2nd degree heart block 2:1 look like on an ECG?

A

Two P waves per QRS, normal consistent PR intervals

17
Q

How does 2nd degree heart block 2:1 present?

A

SOB, postural hypotension, chest pain

18
Q

What does 3rd degree heart block look like on an ECG?

A

Dissociation between P waves and QRS so occur at different rates, abnormally shaped QRS

19
Q

How does 3rd degree heart block present?

A

Dizziness, blackouts

20
Q

How do you manage 3rd degree heart block?

A

Permanent pacemaker, IV atropine

21
Q

What can cause heart block?

A

Athletes, sick sinus syndrome, IHD, acute myocarditis, drugs, congenital

22
Q

How do you manage heart block?

A

Cardioversion, catheter ablation, IV amiodarone

Cardiology (23 decks)

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