Arrhythmia's and Pacemakers

Question 1

Shockable rhythms

Answer 1

Ventricular tachycardia
Ventricular fibrillation

Question 2

Non-shockable rhythms

Answer 2

PEA - incl sinus rhythm wo pulse

asystole

Question 3

Heart block - first degree

Answer 3

delayed conduction through AV node

every atrial impulse > ventricular contraction

every p wave > QRS complex

PR > 0.2 seconds = 5 small or 1 big

Question 4

What is second degree heart block?

Answer 4

two types

Mobitz type 1 - Wenckebach phenomenon

Mobitz type 2

Question 5

Mobitz type 1 (Wenckebach phenomenon)

Answer 5

conduction goes through AV node progressively longer until it finally fails

after which it resets

Question 6

Mobitz type 2

Answer 6

intermittent failure of conduction through atrioventricular node with an absence of QRS complexes

following p waves

PR remains normal

Question 7

what is transvenous pacing?

Answer 7

using a catheter, fed through venous system to stimulate the heart directly

Question 8

indications for pacemakers?

Answer 8

symptomatic bradycardias
mobitz type 2 heart block
third degree heart block

AV node ablation / atrial fibrillation

severe heart failure