ACLS Electrical Therapies and Defibrillation

Question 1

What is the recommended initial energy dose for defibrillation of ventricular fibrillation (VF) using a biphasic defibrillator?

Accepted Answer

120–200 J

Answer

100 J

Answer

300 J

Answer

360 J

Question 2

Which of the following rhythms requires synchronized cardioversion rather than unsynchronized defibrillation?

Accepted Answer

Unstable atrial fibrillation with a pulse

Answer

Ventricular fibrillation

Answer

Pulseless ventricular tachycardia

Answer

Asystole

Question 3

What is the recommended initial energy for synchronized cardioversion of unstable atrial fibrillation using a biphasic device?

Accepted Answer

120–200 J

Answer

25–50 J

Answer

50–100 J

Answer

300–360 J

Question 4

Where should defibrillator pads be placed in the standard anterolateral position?

Accepted Answer

Right subclavicular and left lower rib cage lateral to the left nipple

Answer

Left subclavicular and right lower rib cage lateral to the right nipple

Answer

Both pads on the left chest wall

Answer

Right upper chest and right lower rib cage

Question 5

When using a monophasic defibrillator for VF, what energy level should be used for all shocks?

Accepted Answer

360 J

Answer

100 J

Answer

200 J

Answer

300 J

Question 6

After delivering a defibrillation shock, what should be done immediately?

Accepted Answer

Resume CPR immediately, starting with chest compressions

Answer

Check the pulse and rhythm before resuming CPR

Answer

Administer epinephrine before resuming CPR

Answer

Check the rhythm for 30 seconds to assess response

Question 7

What is the primary purpose of the synchronization feature on a cardioverter-defibrillator?

Accepted Answer

To deliver the shock during the refractory period of the cardiac cycle to avoid the T-wave

Answer

To charge the device faster for rapid delivery

Answer

To reduce the energy required for defibrillation

Answer

To prevent accidental shock to bystanders