The Heart Flashcards
What is the correct order for the cardiac cycle?
- Distole
- Atrial systole
- Ventricular systole
- Diastole
What does myogenic mean?
The heart can generate its own electrical impulse
What is the correct order for cardiac conduction?
- SA node
- AV node
- Bundle of His
- Bundle branches
- Purkynje Fibres
What is the role of the SA node?
Pacemaker gives electrical impulses, causing atrial systole
What is the role of the AV node?
Delays the impulse for 0.1s before passing into the bundle of His
What is the bundle of His?
Located in the septum and splits the impulse into two branches for left and right
What is the role of the bundle branches?
Carries the impulse around the walls of the ventricles
What is the role of the purkynje fibres?
Carries the impulse through the ventricle walls to cause ventricular systole
What is stroke volume?
The volume of blood leaving the left ventricle per cardiac cycle
What is venous return?
The amount of blood to return to the heart between cardiac cycles
What is cardiac output?
The volume of blood leaving the left ventricle per minute
