A person with a heart rate of 170 bpm and a normal QRS duration ...

[maegan_martin]

A person with a heart rate of 170 bpm and a normal QRS duration would most likely be experiencing a
 
  1. yachydysrhythmia originating from the bundle branches.
  2. tachydysrhythmia originating from the atria.
  3. tachydysrhythmia originating from the ventricles.
  4. tachydysrhythmia originating from the Purkinje fibers.

Question 2

Which adverse effect is shared among all antidysrhythmic drugs?
 
  1. Edema
  2. Impotence
  3. Photosensitivity
  4. Prodysrhythmic effects

[duke02]

Answer to Question 1

Correct Answer: 2
Rationale: Given a normal QRS duration, the rhythm is not coming from the ventricles but from the atria.

Answer to Question 2

Correct Answer: 4
Rationale: All antidysrhythmic agents can worsen existing dysrhythmias or create new ones.