Cardiac Conduction System Flashcards
1
Q
Describe the cardiac conduction system in order.
A
1) SA (sinoatrial) node fires
2) Excitation spreads through atrial myocardium - atrial systole
3) AV (atrioventricular) node fires
4) Excitation spreads down Bundle of His
5) Spreads down bundle branches
6) Purkinje fibres distribute excitation through ventricular myocardium - ventricular systole
2
Q
What does ‘myogenic’ mean?
A
Being able to generate its own electrical impulses which originate in the muscle rather than from the nerves.
