Difference Between Aortic Valve and Mitral Valve

For the whole circulatory system, valves perform an important function. The aortic valve and mitral valve are two kinds of valves.  

The aortic valve and mitral valve assure that blood flow through the heart should be unidirectional. They both are located in the heart’s left side and allow the oxygenated blood to flow.

Aortic Valve vs Mitral Valve 

The main difference between the aortic valve and mitral valve is the location. The aortic valve is located in the middle of the left ventricle and the aorta. On the flip side, the mitral valve is located in the middle of the left atrium and left ventricle. The aortic valve comprises three flaps, whereas the mitral valve is comprised of two flaps. 

Aortic Valve vs Mitral Valve

In the human heart, the aortic valve is located in the middle of the left ventricle and the aorta. It generally consists of three leaflets or cusps.

The left atrioventricular valve and the bicuspid valve are other names popular for the Mitral valve. It lies in the middle of the left atrium and left ventricle.

Comparison Table Between Aortic Valve and Mitral Valve

Parameters of CompadrisonAortic ValveMitral Valve
Location In the middle of the left ventricle and the aorta In the middle of the left atrium and left ventricle
Type of valveSemilunar valvesAtrioventricular valves
RhythmWhen the mitral valve opens aortic valve closes When the aortic valve opens mitral valves closes
RoleSupplies blood to the aortaSupplies blood to the left ventricle
FlapsThree flapsTwo flaps

What is Aortic Valve? 

Among the semilunar valve, the aortic valve is one of the two kinds. It is generally located in the middle of the left ventricle and the aorta.

To allow the flow into the aorta of the oxygenated blood at the ventricle systole the left ventricle contracts. The chief artery of the body is the aorta and throughout the body supplies oxygenated blood.  

The ventricle relaxes at diastole and inside the ventricle leads to low pressure. As a result, the blood present inside the aorta moves back to the left ventricle. But to prevent this situation, the aortic valves close themselves.

This process allows the supply of the blood with pressure to the aorta. There are mainly two types of clinical conditions related to the aortic valve are aortic stenosis and aortic insufficiency/ aortic regurgitation. 

What is Mitral Valve? 

Among the left atrioventricular valve, the mitral valve is one of the two types. It is located in the middle of the left atrium and the left ventricle.  

Through the pulmonary veins, the left atrium from the lungs receives oxygenated blood. With the help of the left ventricle, this blood is transferred to the aorta.

After this, the mitral valve comes into the role to prevent the blood flow in the backward direction. At this moment, the mitral valve is generally closed. .  

There are mainly three types of clinical problems that occur in the mitral valve. The first is the mitral valve prolapse is in which the muscles of the valve start losing. The second is mitral valve stenosis, and the last is mitral valve regurgitation. 

Main Differences Between Aortic Valve and Mitral Valve 

  1.  The semilunar valve closure together with the aortic valve produces the second heart or dub sound, while the closure of the atrioventricular valves together with the mitral valve produces the first heart or lub sound.  
  2. From the left ventricle, the aortic valve supplies the blood. On the flip side, from the left atrium, the mitral valve supplies the blood. 
Difference Between Aortic Valve and Mitral Valve

Conclusion 

It can be concluded that the aortic valve and mitral valve are located in the heart’s left side, mainly inside the chambers. The aortic valve is located in the middle of the left ventricle and the aorta.

The main function of the aortic valve is to supply blood to the aorta, whereas the mitral valve supplies blood to the left ventricle. 

References 

  1. https://www.taylorfrancis.com/books/mono/10.4324/9780203737163/aortic-valve-mano-thubrikar
  2. https://www.sciencedirect.com/science/article/pii/S0140673605178696
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