control and regulation of cardiac cycle
- Created by: Chantelle..
- Created on: 11-01-19 15:39
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- control and regulation of the cardiac cycle
- pumping and filling is brought about by electrical control
- SA node
- passes electrical wave through the atria
- making them contract
- passes electrical wave through the atria
- fibrous tissue
- spans he heart between atria and ventricles
- prevents wave passing through
- AV node
- patch of tissue that allows current through
- top of the wall separating two ventricles
- slows passage of current down
- allows ventricles to fill with blood
- purkyne fibres
- carry current to middle of the ventricles
- to the base of the heart
- allows bottom of the heart to contract first
- results in upward squeezing action
- forcing blood out into arteries
- results in upward squeezing action
- carry current to middle of the ventricles
- electrical co coordination can be observed through ECG monitor
- electrodes attached to the chest
- P wave
- atria's contracting
- QRS wave
- ventricles contracting
- systole
- ventricles contracting
- T wave
- ventricles relaxing
- diastole
- ventricles relaxing
- ECG trace
- represents cardiac cycle
- lasts 0.85 seconds
- a heartbeat
- can show issues affecting the heart
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