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As the Blood goes down from the Atrium to the Ventricles:

  • The Tricuspid Valve ( Right Atrioventricular Valve)
  • Bicuspid Valve (Mitral Valve )

The atrial pressure is INCREASES WHEN ATRIA ( THE ATRIA CONTRACTS AT THIS STAGE/ATRIA SYSTOLE) Thus:

  • fills the ventricles with blood ( blood goes down from the atria to the ventricles)
  • The Tricuspid/ Bicuspid valves OPENS since there is a higher pressure of Atria than the Ventricle

Questions:

  • Is the Ventricular Filling, (When Blood from Atria fills the Ventricles) itself a DIASTOLE or SYSTOLE
  • So during the Ventricular Diastole

  • Ventricular Filling is Diastole?? ,

  • Is it when VENTRICLES are filled with blood :

    it increases THE PRESSURE IN IT SO THAT IT MAKES A (** VENTRICULAR DIASTOLE /VENTRICULAR CONTRACTION **)

I also saw in here that: " The P wave represents the atrial electrical depolarization. This phase is ventricular diastole. During filling, pressure within the right atrium increases, pushing blood across the AV valves into the right ventricle."

I'd also like to clarify:

Shouldn't it be WHEN IT FILLS THE VENTRICLE is filled, THE PRESSURE GOES LOW in atria gradually within the??? I get it that the atrium has a HIGHER PRESSURE BEFORE FILLING and it makes the (TRICUSPID AND BICUSPID) valve OPEN

Kindly clarify through diagrams and steps, I'm somehow confused. Thank you! You can kindly watch this short clip of video and this may help me clarify things:

http://highered.mheducation.com/sites/0072495855/student_view0/chapter22/animation__the_cardiac_cycle__quiz_1_.html

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Ventricular diastole is a period in cardiac cycle during which the ventricles are filling with blood. During this period, the atria are contracting and the ventricles are relaxed.

The diastole consist of this: atrioventricular valves open, atria contract (atrial systole), blood flows from the atria to the ventricles, the atrioventricular valves close.

When the term systole or diastole is used without saying is it atrial or ventricular, it means it is ventricular. For example, systolic blood pressure is the blood pressure during ventricular systole and diastolic during ventricular diastole.

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  • $\begingroup$ According to what i've read and during ventricular filling the valves open because of there is lower pressure in the ventricles, however the atria contracts only on the later stage of ventricular filling it does not take most part of the ventricular filling $\endgroup$ – Via Lo May 25 '18 at 2:21
  • $\begingroup$ There are detailed graphs available, if you are interested in the exact timing of all events of the cardiac cycle. $\endgroup$ – Jan May 30 '18 at 14:16

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