C252 Approach To Ventricular Arrythmias

Question 1

Origin of focal VAs vs reentrant VAs

Answer 1

Focal VA: Myocardial or Purkinje cells

Reentrant VA: Areas of scar

Question 2

Site of origin of VAs and the implications eme

Answer 2

Question 3

Most common cause of VF

Answer 3

Cardiac ischemia

Question 4

Sustained VT may present as a wide QRS complex tachycardia that must be distinguished from ________

Answer 4

Sustained VT may present as a wide QRS complex tachycardia that must be distinguished from supraventricular tachycardia with aberrancy

Question 5

Appearance of ventricular scar in cardiac MRIs

Answer 5

Delayed hyperenhancement

Question 6

First choice of therapy for most VAs

Answer 6

B blockers

Question 7

Examples of sodium channel blocking agents

Answer 7

Mexiletine
Quinidine
Disopyramide
Flecainide
Propafenone

Question 8

Sodium channel blocking agents that also have potassium channel blocking effect (3)

Answer 8

Quinidine
Disopyramide
Procainamide

Question 9

Examples of K channel blocking agents

Answer 9

Sotalol
Dofetilide

Question 10

Specific K channel blocked by sotalol and dofetilide

Answer 10

Delayed rectifier K channel

Question 11

K channel blocker that also has nonselective B adrenergic blocking activity

Answer 11

Sotalol

Question 12

Most effective antiarrhtymic drug

Answer 12

Amiodarone

Question 13

Major adverse cardiac effect of amiodarome

Answer 13

Bradycardia

Question 14

Difference ng amiodarone vs drodenarone

Answer 14

Walang iodine content (?) ang drodenarone

Question 15

What is antitachycardia pacing ?

Answer 15

Monomorphic VT can also be terminated by a burst of rapid pacing faster than the VT called ATP

Question 16

Most common ICD complicatiom

Answer 16

Delivery of unnecessary therapy

Question 17

Frequency of device infection in ICDs

Answer 17

About 1%

Question 18

ICDs are recommended only if there is expectation for survival for at least ____year

The exception is in cases of ….. (2)

Answer 18

At least one year

(1) Awaiting cardiac transplantation…
(2) LBBB QRS prolongation

Question 19

Which layer of heart most arrythimias originate

Answer 19

Endocardium

Question 20

If arrythimias originate from the SUBEPICARDIUM, what method shoudl be ysed in catheter ablation

Answer 20

Percutaneous pericardial puncture

Question 21

Used to direct radiation therapy to a specific part of heart scar substrate to non invasively ablate VT

Answer 21

Stereotactic body radiation therapy