CVR 29 antiarrhythmic drugs

Question 1

What ion are we particularly worried about in normal sinus rhythm?

Answer 1

Potassium

others are 
Na
Cl
Mg
Ca

Question 2

What is paroxysmal

Answer 2

when it starts and stops abruptly and incessant when it continues

Question 3

What does an ECG of Wolfe Parkinson Whyte syndrome look like

Answer 3

wide complex supra ventricular tachycardia

Question 4

What are some causes of arrhythmias

Answer 4

structureal abnormality of myocardium

ischaemia

heart failure

hypertrophic obstructive cardiomyopathy

Question 5

What is brugada syndrome

Answer 5

autosomal dominant inherited

Structureally normal heart

ST segment elevation in right heart leads

Ventricular tachycardia

Rx ICD (implantable cardioverter defibrillator)

Question 6

Classes in the vaughan williams classification

Answer 6

1a = disopyramidide (prolong QT)

1b = lignocaine - seizures

1c = propafenone (block fast Na channels)

2 = beta blockers

3 = amiodarone (slow repolarization)

4 = calcium channel blockers