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Directed study

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
        Help!  

Question
Answer
P wave   Atrial depolarization  
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a wave   Atrial systole  
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QRS complex   Ventricular depolarization  
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c wave   Ventricular systole  
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v wave   AV valve opens and ventricles fill  
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Isovolumic contraction   Mitral and Aortic valve closed  
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When does the aortic valve open   around 80mm Hg  
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S1 or "lub"   AV valve closing  
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S2 or "dub"   Aortic valve closing  
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The Mitral valve closes when   The QRS complex has been initiated  
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The aortic valve opens   When left ventricular pressure equals aortic pressure, when ventricular volume is at its max, during the c wave of atrial pressure, at the end of diastolic runoff of arterial pressure  
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The aortic valve closes   At the start of S2, When ventricular myocytes all enter phase 3 of the action potential  
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The first heart sound, S1, is   Vibrations from closing of mitral and tricuspid valves  
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The C wave of atrial pressure is   Elevated when the mitral valve is leaky and because the left atrial filling and bulging of the mitral valve  
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Peak systolic pressure occurs   Between aortic closing  
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