heart cyle (valves)

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  • Created by: P15198914
  • Created on: 15-02-16 20:03
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  • heart cycle
  • ventricular diastole (late)- all chambers are relaxed; passive ventricular filling occurs
    • atrial systole begins- atrial contraction forces a small amount of additional blood into ventricles
      • atrial systole ends, atrial diastole begins- atrial contraction ends and ventricular contraction begins
        • ventricular systole (first phase)- ventricular contraction pushes AV valves closed but does not generate enough pressure to open SL valves
          • ventricular systole (second phase)- as ventricular pressure rises and exceeds pressure in the arterial trunks, the SL valves open and blood is ejected
            • ventricular diastole (early)- as ventricles relax, ventricle pressure drops; blood flows back against SL valves and forces them closed. blood flows into the relaxed atria
              • ventricular diastole (late)- all chambers are relaxed; passive ventricular filling occurs
                • atrial systole begins- atrial contraction forces a small amount of additional blood into ventricles
                  • atrial systole ends, atrial diastole begins- atrial contraction ends and ventricular contraction begins
                    • ventricular systole (first phase)- ventricular contraction pushes AV valves closed but does not generate enough pressure to open SL valves
                      • ventricular systole (second phase)- as ventricular pressure rises and exceeds pressure in the arterial trunks, the SL valves open and blood is ejected
                        • ventricular diastole (early)- as ventricles relax, ventricle pressure drops; blood flows back against SL valves and forces them closed. blood flows into the relaxed atria

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