Cardiology devices Flashcards
1
Q
Draw a defibrillator circuit
A
2
Q
What is a defibrillator
A
releases a controlled electric charge that is expressed as units of electric energy
3
Q
How many amperes are typically discharged in a defibrillator? Voltage?
A
30 amps
3 milisecond discharge
3000-5000 volts
More sophisticated defibs estimate the impedence and adjust the shock voltage accordingly. Biphasic defibrillators shcok the heart through two directions rather than one using a lower peak current and lower energy level
4
Q
Internal paddles during cardiac surgery you can shock using what amount of joules
A
5-50J
5
Q
Implantable cardioverter defibs use what joules ot shock
A
25-40J
6
Q
What is the typical conduction velocity comparison between atrial, AV node, purkinje fibres and ventricle cells?
A
