Cardiac Cycle
- Created by: laureningliss
- Created on: 07-10-19 09:48
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- Cardiac Cycle
- Atrial Systole:1
- Blood is under low pressure
- Atria fills with blood
- Increases blood pressure against AV valves
- Pushes AV valves open and blood begins to flow into ventricles
- Atria walls contract and forces more blood into ventricles and this is the ATRIAL SYSTOLE.
- Pushes AV valves open and blood begins to flow into ventricles
- Increases blood pressure against AV valves
- Atria fills with blood
- Blood is under low pressure
- Ventricular Systole:2
- Ventricles contract upward
- Increases pressure and forces open semilunar valves
- Pushes blood out of pulmonary arteries and aorta
- Pressure of blood against AV valves closes them and prevents backflow of blood.
- Pushes blood out of pulmonary arteries and aorta
- Increases pressure and forces open semilunar valves
- Ventricles contract upward
- Cardiac Diastole:3
- Atria and ventricles relax.
- Elastic recoils and lowers pressure
- Blood under high pressure in arteries and aorta is drawn back to ventricles
- Closes semi-lunar valves and prevents back flow
- Coranary arteries fill
- low pressure in atria draws blood into heart
- Coranary arteries fill
- Closes semi-lunar valves and prevents back flow
- Blood under high pressure in arteries and aorta is drawn back to ventricles
- Elastic recoils and lowers pressure
- Atria and ventricles relax.
- Wigger's Diagram
- A diagram that shows the different pressures of blood in the aorta,ventricle and atrium
- In the ventricles, the blood pressure starts rather low.Then,early on, there is a 'n' shaped curve before a very large 'N' shaped curve in the middle of the cycle resulting in a very high blood pressure at its peak.Yet, it rapidly comes back don and then there's another small 'N' shaped curve at the end before returning to its original pressure.
- In the Aorta, the blood pressure starts the highest and then dips early on slightly-however,it then rises above its starting pressure and then in a 'n' shaped curve it comes back down in the middle and then remains at a constant pressure onward for the rest of the cycle
- In the atrium, there is a starting low pressure that stays low.There are two slight rises in the first half ,yet, after that is stays at its original low pressure constantly.
- A diagram that shows the different pressures of blood in the aorta,ventricle and atrium
- Atrial Systole:1
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