L10 , Digitalis toxicity , toxicology

Lecture Video



Put true or false

  1. In digitalis toxicity. Fab fragments should be administrated immediately without any precautions. (f)

  2. Digoxin overdose frequently associated with repeated vomiting. (t)

  3. Potassium level monitoring has a more prognostic value than serum digoxin level. (t)

  4. Activated charcoal has no role in cases of delayed presentation of digoxin overdose cases. (f)

  5. Digibind can reverse all complications of digitalis toxicity except hyperkalemia(f) 

1- Which is a use for digoxin

a) To treat infections

b) To treat heart failure

c) To treat allergies

d) To treat depression

2- What level indicates digoxin toxicity

a) 3 ng/mL

b) I ng/mL

c) 0.5 ng/ml.

d) 0.2 ng/ml.

3- Referred to digoxin, all are true except

a) Rapidly absorbed from GIT.

b) Has small volume of distribution.

c) Predominantly eliminated by urinary excretion.

d) Has narrow therapeutic index.

4- During digoxin therapy, it is essential to monitor serum potassium

levels because

a) Low potassium levels increase the chance of digitalis toxicity

b) High potassium levels increase the change of digitalis toxicity

c) Low potassium levels cause an increase in heart rate 

d) Digoxin promotes the excretion of potassium in the kidneys

5- The most prognostic finding for management of acute digitalis toxicity is

a) Serum K level.

b) Serum digoxin level

c) ECG changes.

d) GIT manifestations.

6- Digitalis can induce all the following dysrhythmia a) A-V nodal block. except

a) Sinus bradycardia.

b) Sinus tachycardia

c) Ventricular tachycardia.

7- The most diagnostic(pathognomonic) dysrhythmia for digitalis toxicity

a) Ventricular bigeminy.

b) AV nodal block.

c) AV nodal block associated with ventricular dysrhythmia.

d) Bidirectional ventricular tachycardia.

8- About brady-dysrhythmia caused by acute digoxin toxicity, all are true except

a) Caused by increased vagal tone.

b) Non atropine responsive.

c) Associated with increased ventricular automaticity.

d) occurs as intial cardiac effect.

9- All the following are contraindicated in digitalis-induced dysrhythmia, except:

a) Quinidine.

b) Procainamide.

c) IV Calcium.

d) Phenytoin.