Cardiac

What is the main ECG finding in 1st-degree AV block?

• PR interval less than 0.12 seconds

• PR interval greater than 0.20 seconds

• Dropped QRS complexes

• Irregular rhythm

How is a stable 1st-degree AV block usually treated?

• Defibrillation

• Pacemaker

• Monitor and review medications

• Synchronized cardioversion

What does the ECG show in Mobitz Type I?

• Constant PR interval

• No P waves

• Progressively longer PR interval, then a dropped beat

• Wide QRS

What medication might be used if a patient with Type I AV block is symptomatic?

• Amiodarone

• Atropine

• Magnesium

• Lisinopril

Which feature is most concerning in Mobitz II?

• Stable blood pressure

• Progressively longer PR interval

• Risk of complete heart block

• Regular rhythm

What is the best treatment for symptomatic Mobitz II?

• Atropine only

• Transcutaneous pacing

• Calcium channel blocker

• Observation

In 3rd-degree AV block, what do the atria and ventricles do?

• Beat together

• Have no electrical activity

• Beat separately with no coordination

• Both stop beating

If TCP is unavailable for 3rd-degree AV block, what drug is used?

• Digoxin

• Metoprolol

• Dopamine

• Magnesium

What is the first action for a patient in asystole?

• Defibrillate

• Synchronized shock

• Start CPR

• Give adenosine

What medication is used during CPR for asystole or PEA?

• Amiodarone

• Atropine

• Epinephrine

• Lidocaine