Pressure and Volume Changes in the Chambers

4 important questions on Pressure and Volume Changes in the Chambers

How does pressure change in the atria?

Left atrial contraction slightly before systole causes topping up of blood inside left ventricle. While systole is occurring, the mitral valve is shut, so when diastole occurs and the mitral valve is opening, blood will slowly build up again and increase pressure within left atria

How to calculate stroke volume

SV = EDV - ESV

SV= stroke volume
EDV = end diastolic volume (volume of blood in ventricle at the end of relaxation, 130-135mLs)
ESV = end systolic volume (in systole, volume decreases by 70mLs due to SV output, the remaining volume in ventricle is 60-65mLs)

What happens to the aortic pressure during diastole?

When aortic valve is closed during diastole, elastic recoil of aorta maintains high pressure in the arteries
  • Higher grades + faster learning
  • Never study anything twice
  • 100% sure, 100% understanding
Discover Study Smart

What is the dicrotic notch?

It is a small dip and rebound in the aortic pressure curve after the aortic valve closes. It is caused by a small amount of blood briefly flowing backward towards the ventricle that shuts the valve

The question on the page originate from the summary of the following study material:

  • A unique study and practice tool
  • Never study anything twice again
  • Get the grades you hope for
  • 100% sure, 100% understanding
Remember faster, study better. Scientifically proven.
Trustpilot Logo