Electrophysiology

Question 1

What 5 procedures will paint the full picture of a patient’s sinus node function?

Answer 1

1. exercise testing to bring about arrhythmia
2. ambulatory ECG/Holter monitor
3. tilt table testing
4. invasive EP study
5. loop event recorder

Question 2

Who would be a primary candidate for an EP study?

Answer 2

• symptomatic patient with the source suspected as sinus node abnormalities
• patients with complaints of symptoms that hint at a His-Purkinje block

Question 3

Class II

Answer 3

1. pt with documented sinus node dysfunction in whom evaluation of conduction or susceptibility may help determine best
   pacemaking device
2. pt whose ECG shows sinus bradyarrhythmias, but unknown if source is intrinsic, autonomic nervous system, or drug effect
3. symptomatic pt with confirmed sinus bradyarrhythmia, but unknown if other arrhythmias are at play

Question 4

Class III

Answer 4

1. pt has known bradyarrhythmia and known etiology, outcome of EP study wouldn’t affect therapy
   2.

Question 5

What does AVNR look like on the electrocardiogram?

Answer 5

atrial markings and ventricular markings overlapping