QRS complex

 

This represent the beginning of ventricular systole. Half of it during the cardiac cycle is at the end of atrial systole and the remaining half at ventricular systole, i.e. contraction of the ventricle.

       

 

 

 

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1 isovolumetric contraction 2 ejection 3 isovolumetric relaxation 4 rapid inflow 5 diastasis 6 atrial systole  

 

 

 

 

 

 

 

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