Cardiac Cycle and Conduction

what is D

• atriole systole

• first phase of ventricular systole

• second phase of ventricular systole

• early ventricular diastole

• late ventricular diastole

what is E

• atriole systole

• first phase of ventricular systole

• second phase of ventricular systole

• early ventricular diastole

• late ventricular diastole

in second phase of ventricular systole

• ventricles contracts

• bicuspid valve closed

• tricuspid valve closed

• blood pumped out

• semilunar valves open

why is it important for signal conduction in heart to stop for a while in AV node?

• to prevent atrium and ventricle from contracting at the same time

• to prevent blood too much flowing from atrium to ventricle

• to make sure that all valves are open before blood sent out from heart

• to make sure there is enough time for atrium to receive blood from veins

'signal assembly point'

• SA node

• AV node

• bundle of his

• purkinje fibres

distribute signal along right and left ventricle

• SA node

• AV node

• bundle of his

• purkinje fibres

what is A

• SA node

• AV node

• bundle of His

• purkinje Fibre

what is B

• SA node

• tracks to AV node

• bundle of His

• purkinje Fibre

what is C

• SA node

• tracks to AV node

• bundle of His

• purkinje Fibre

what is E

• SA node

• tracks to AV node

• bundle of His

• purkinje Fibre