Aortic Valve

Aortic valve

What an aortic valve is:

The heart valve present in between the left ventricle and aorta is called aortic valve which is a tricuspid valve. In some people about 1% of the population has inborn bicuspid aortic valve. The valve is named so because it is present in between the left ventricle and aorta as well as it controls the flux of blood from left ventricle towards aorta.

Function:

When there is a ventricular systole the pressure in the left ventricle increases and this leads to the greater pressure in the left ventricle as compared to the aorta and ultimately this all results in the opening of the aortic valve. As the aortic valve the blood flux moves from left ventricle into the aorta. At the completion of the ventricular systole the ventricular pressure drops suddenly and at the same time the pressure in the aorta rises and this leads to the closure of the aortic valve. This opening and closing of the aortic valve produces the heart sound S2.

Disorders relating aortic valve:

There are two types of disorders responsible for the improper working of the aortic valve and those are:

• Aortic stenosis
• Aortic regurgitation

Aortic stenosis stands for the incomplete opening of the aortic valve hence blood doesn’t completely move into the aorta while aortic regurgitation is the disorder in which the aortic valve doesn’t close properly and in return the blood moves towards the wrong direction i.e. back towards the left ventricle is the disorder in which the aortic valve doesn’t close properly and in return the blood moves towards the wrong direction i.e. back towards the left ventricle.

Causes of aortic valve disorders:

Rheumatic fever is the common cause of both aortic stenosis and aortic regurgitation while other causes of aortic stenosis are degenerative calcification and inborn bicuspid aortic valve. Enlargement of the aorta, infective endocarditis, myxomatous, Marfan’s syndrome and breakdown of the aortic valve are responsible for the aortic valve regurgitation.

Bicuspid aortic valve:

It is an inborn disorder of aortic valve and it is present in only 1% of the population. In this congenital disorder there are two leaflets of the aortic valve instead of the three leaflets. This disorder is left undiagnosed until the symptoms of aortic stenosis occur in later life. The occurrence of aortic stenosis in bicuspid aortic valve people is faster then the people with normal tricuspid aortic valve. Turner’s syndrome is also a cause of associated bicuspid aortic valve.

Aortic valve replacement:

The replacement of a diseased aortic valve with a new healthy valve is called aortic valve replacement. There are different diseases which can leads to the aortic valve replacement. Two conditions can lead to aortic valve replacement which is either the leakage of the aortic valve or the partial closure of the aortic valve. There are further two types of aortic valve replacement which depends upon the type of valve used to replace the diseased aortic valve. There are two types of aortic valves which are:

• Biological aortic valve:
This type of aortic valve is extracted from a living being and is placed in the diseased patient.

• Mechanical valve:
This type of valve is also called artificial aortic valve as this valve is made up of cloth, metal or artificial tissues.

Heart murmurs in adults

What are heart murmurs in adults?

We all read or heard talking about heart murmurs in adults, and many of us are curious to find out if  they have this dysfunction. A few know the true meaning of this condition, that’s why when our physician tells us we have  heart murmurs either we think we suffer from a devastating disease, either we ignore it, but none of this reaction is normal.  Next we will clarify the meaning and the cause for heart murmurs, in order to prepare people that might be diagnosed with this disorder to understand and deal their condition properly.
Heart murmurs in adults refer to the abnormal sounds heard by doctors when they listen to the heartbeats with a stethoscope. In medical practice, hearing  heart murmurs in adults raises the suspicion of heart valve pathology, but sometimes these abnormal heart sounds can occur in other conditions like a defect in the heart wall, anemia, fever etc. When there is no heart modification that can explain the murmurs, they are called functional. Because this condition can occur in other pathologies beside hear disorder, everytime we suspect a heart murmurs in adults we should check its presence with an echocardiography examination.
Heart murmurs affect both children and adults and are recognized as the “noise” heard between the two normal heart sounds. If the murmur occurs after the first heart sound is called systolic, which means it occurs during heart contraction, and if it occurs after the second heart sound is called diastolic and this means it occurs while heart is in its relaxation period. The classification into systolic and diastolic is important because it indicates whether we are facing a valve stenosis (narrowing of the heart valve) or insufficiency (the valves fail to close properly, letting blood to flow back into the heart chambers). There are other classifications for heart murmurs in adults, but those medical terms are more important for the specialists.

 Why do heart murmurs in adults occur and how we deal with them?

 As we explained above, in most of the cases heart murmurs in adults occur when there is a heart pathology:

• heart valve narrowing or closure impairment, in this case the blood flow becomes turbulent and makes a noise that we call it murmur,
• a defect in heart wall-a congenital defect that occurs in children, allowing blood to flow from one side of the heart to the other, determining blood with oxygen and blood with carbone dioxide to mix. Sometimes this condition can remain undiagnosed until late adulthood, because it is a small defect and doesn’t cause symptoms, but in many cases is diagnosed soon after birth, being recognized as a prolonged murmur (noise) heard during heart auscultation and needs surgical correction. Another type of heart murmur heard in children is the one determined by the ductus arteriosus persistence (a connection between aorta and pulmonary artery in the uterine life).
• other condition like anemia or fever can determine heart murmurs in adults, because they determine turbulent blood flow, but this murmur disappears once the condition is treated.

How do we  with deal heart murmurs in adults ? In patients suffering from valve pathology periodically monitoring is important because in time they can lead to heart failure, in order to prevent this, surgical replacement of the valves can be performed. Heart wall defect can also be repaired providing a normal life for these patients, while the causes for functional heart murmurs in adults once treated determine these abnormal heart sounds to disappear.

Heart murmurs in adults are a serious medical condition,  if you think you have it call your doctor.