Arrhythmias

Question 1

CPVT is associated with mutations in what receptors?

Answer 1

calsequestrin and ryanodine receptor mutations

Question 2

ARVC is associated with mutations in what molecule?

Answer 2

plakophilin

Question 3

what would be the indication for PPM for isolated first degree AV block

Answer 3

there are some uncontrolled trials which show benefit in symptomatic patients with PR >300ms

Question 4

what is pacemaker hysteresis?

Answer 4

an additional delay beyond the base rate for which pacemaker is set to wait before initiating paced beats

Question 5

Which antiarrhythmic class can unmask Brugada on ECG?

Answer 5

Class 1C (flecanide and propafenone)

Question 6

Hyperkalemic T waves look … (name 3 qualities)

Answer 6

peaked, narrow based, and symmetric

Question 7

What does hypocalcemia look like on ECG?

Answer 7

prolongation of QTc due to lengthening of the ST segment

Question 8

What ECG findings are seen with ostium primum?

Answer 8

incomplete RBBB and left axis deviation

Question 9

What are the criteria for LPFB?

Answer 9

RAD (>+90 degrees), rS in high lateral leads, qR in inferior leads

Question 10

What is disopyramide and what is it primarily used for?

Answer 10

Class Ia anti arrhythmic; primarily used for VT, but also used for HOCM and can be used for atrial fibrillation (off-label)

Question 11

CRT should be pursued if a patient with a device is expected to pace more than ____% of the time

Answer 11

40%