Week 5 - Arrythmia

Question 1

Describe the actions of catecholamines on blood vessels and the heart

Answer 1

Adrenaline and noradrenaline both increase HR via an action on beta1 receptors in the SA node

Question 2

The underlying disease most often associated with multifocal atrial tachycardia is?

Answer 2

COPD

Question 3

The phase of the action potential in which pacemaker cells differ from other cardiac cells is?

Answer 3

Phase 2 (plateau phase, absent in pacemaker cells)

Question 4

Chest pain that is relieved by sitting up and leaning forward is classically caused by

Answer 4

Pericarditis

Question 5

Causes of prolonged QT interval on ECG?

Answer 5

Result of hypokalemia, hypomagnesemia, hypocalcaemia; medication side effect; inherited