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why does aortic stenosis cause narrow pulse pressure

by Myra Fadel Published 3 years ago Updated 2 years ago
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In aortic stenosis, there is a narrowing of the aortic valve, which interferes with the ejection of blood from the left ventricle into the aorta, which results in a decrease in stroke volume and a subsequent decrease in pulse pressure.

Symptoms

  • Cardiac tamponade, i.e., cardiac compression because of blood deposition in the space between the pericardium and the cardiac muscle.
  • Pericardial effusion, i.e., excessive fluid buildup in the pericardial cavity.
  • Constrictive pericarditis, i.e., prolonged pericardium inflammation marked by elasticity loss and scarring of the pericardium.

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Causes

What does a narrow pulse pressure mean? A narrow pulse pressure — sometimes called a low pulse pressure — is where your pulse pressure is one-fourth or less of your systolic pressure (the top number). This happens when your heart isn’t pumping enough blood, which is seen in heart failure and certain heart valve diseases.

Prevention

Narrow pulse pressure can indicate that you have poor heart function. This is generally below 40 mmHg. For example, the Texas Heart Institute Journal reported that people with low pulse pressure of less than 35 mmHg and high heart rates were at greater risk of suffering a fatal cardiac arrest. 2 Advertisement

Complications

You’d calculate your pulse pressure using the following steps:

  • Add the two pulse pressures together. 42 + 38 = 80
  • Divide the total from step 1 by the number of times you took the measurement, in this case, twice. 80 / 2 = 40
  • The number you got in step 2 is average pulse pressure is 40.

What are the symptoms of narrow pulse pressure?

What is considered a narrow pulse pressure?

What does a narrow pulse pressure indicate?

How do you calculate the pulse pressure?

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What does a narrow pulse pressure indicate?

A narrow pulse pressure — sometimes called a low pulse pressure — is where your pulse pressure is one-fourth or less of your systolic pressure (the top number). This happens when your heart isn't pumping enough blood, which is seen in heart failure and certain heart valve diseases.

Does aortic stenosis cause wide pulse pressure?

The pulse pressure is the difference between the systolic and diastolic blood pressure. Classically, a wide (high) pulse pressure is a sign of aortic valve regurgitation and a narrow (low) pulse pressure is a sign of aortic stenosis.

Why does aortic stenosis increase pulse pressure?

The high resistance across the stenotic mitral valve causes blood to back up into the left atrium, thereby increasing LA pressure, which in this example is 25 mmHg (normally ~10 mmHg). This results in the LA pressure being much greater than the LV pressure during diastolic filling.

How does aortic stenosis affect pressure?

In aortic valve stenosis, the aortic valve opening is narrowed (top row). The narrowing requires increased pressure within the heart to pump blood across a smaller opening. Eventually this reduces the heart's ability to pump blood to the body.

What causes wide pulse pressures?

Pulse pressure naturally increases over time as individuals' age due to arteriosclerosis and diffuse vascular stiffening. However, the differential for widened pulse pressure is broad and includes causes of hyperdynamic circulation and high‐output heart failure, such as aortic regurgitation and hyperthyroidism.

What is the significance of a wide pulse pressure?

Wide pulse pressure is usually an indication that something is causing your heart to work less efficiently. If you take your blood pressure regularly and calculate that your pulse pressure is wider than usual, it's best to follow up with your doctor to figure out what's causing it.

Why is pulse pressure higher in large arteries than aorta?

Because the aorta is the most compliant portion of the human arterial system, the pulse pressure is the lowest. Compliance progressively decreases until it reaches a minimum in the femoral and saphenous arteries, and then it begins to increase again.

Why is pulse pressure higher in large arteries than aorta?

Because the aorta is the most compliant portion of the human arterial system, the pulse pressure is the lowest. Compliance progressively decreases until it reaches a minimum in the femoral and saphenous arteries, and then it begins to increase again.

What kind of murmur is heard with aortic stenosis?

The typical murmur of aortic stenosis is a high-pitched, "diamond shaped" crescendo-decrescendo, midsystolic ejection murmur heard best at the right upper sternal border radiating to the neck and carotid arteries (see figure below). In mild aortic stenosis, the murmur peaks in early systole.

What are the risk factors for aortic valve stenosis?

Risk factors of aortic valve stenosis include: Older age. Certain heart conditions present at birth (congenital heart disease) such as a bicuspid aortic valve. History of infections that can affect the heart. Having cardiovascular risk factors, such as diabetes, high cholesterol and high blood pressure.

How severe is aortic valve stenosis?

Aortic valve stenosis ranges from mild to severe. Signs and symptoms generally occur when narrowing of the valve is severe. Some people with aortic valve stenosis may not have symptoms for many years.

What are the four valves that keep blood flowing in the correct direction?

Your heart has four valves that keep blood flowing in the correct direction. These valves include the mitral valve, tricuspid valve, pulmonary valve and aortic valve. Each valve has flaps (cusps or leaflets) that open and close once during each heartbeat. Sometimes, the valves don't open or close properly. If a valve doesn't fully open or close, blood flow is reduced or blocked.

How many cusps does the aortic valve have?

However, some people are born with an aortic valve that has two cusps (bicuspid aortic valve). Your heart has four valves that keep blood flowing in the correct direction.

What is the name of the condition where the aortic valve is narrowed?

Aortic valve stenosis. In aortic valve stenosis, the aortic valve opening is narrowed (top row). The narrowing requires increased pressure within the heart to pump blood across a smaller opening. Eventually this reduces the heart's ability to pump blood to the body.

What is the calcium buildup in the heart?

Calcium is a mineral found in your blood. As blood repeatedly flows over the aortic valve, calcium deposits can build up on the heart valves (aortic valve calcification).

What heart condition is present at birth?

Certain heart conditions present at birth (congenital heart disease) such as a bicuspid aortic valve

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Overview

Symptoms

Medically reviewed by
Dr. Kabir Sethi
Symptoms
If you or someone you know is exhibiting symptoms of Aortic valve stenosis, seek medical attention immediately.

Symptoms may show up when narrowing of the valve is severe and may include:

  • Heart murmur (abnormal swooshing sound produced by the heart as it beats)
  • Chest pain
  • Tiredness after exertion
  • Shortness of breath after exertion (exercise or moving)
  • Heart palpitations

Causes

  • Aortic valve stenosis is caused by genetic factors or certain health conditions which may have an impact on proper functioning of aortic valve. The causes may include:
  • Congenital heart defect
  • Calcification of the valves- If calcium deposits on the aortic valve, it prevents proper opening or closing leading to this condition
  • Infective conditions like rheumatic fever
  • Risk factors include
  • Age - more common among older age people
  • Uncontrolled high blood pressure, diabetes or high cholesterol
  • Infection that may affect heart
  • Chronic kidney disease

Prevention

  • Take steps to prevent rheumatic fever
  • Address risk factors for coronary artery disease which include high blood pressure, obesity and high cholesterol
  • Take care of teeth and gums so as to avoid infected gums (gingivitis); It is linked to infection in the heart tissue (endocarditis) which narrows arteries aggravating aortic valve stenosis

Complications

Complications may include:

  • Heart failure
  • Stroke
  • Blood clots
  • Bleeding
  • Heart rhythm abnormalities (arrhythmias)
  • Infection of the heart such as endocarditis

Causes

Risk Factors

Complications

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Aortic valve stenosis — or aortic stenosis — occurs when the heart's aortic valve narrows. The valve doesn't open fully, which reduces or blocks blood flow from your heart into the main artery to your body (aorta) and to the rest of your body. Your treatment depends on the severity of your condition. You may need surgery t…
See more on mayoclinic.org

Prevention

  • Aortic valve stenosis ranges from mild to severe. Signs and symptoms generally occur when narrowing of the valve is severe. Some people with aortic valve stenosis may not have symptoms for many years. Signs and symptoms of aortic valve stenosis may include: 1. Abnormal heart sound (heart murmur) heard through a stethoscope 2. Chest pain (angina) or tightness with acti…
See more on mayoclinic.org

1.Aortic Stenosis Overview | American Heart Association

Url:https://www.heart.org/en/health-topics/heart-valve-problems-and-disease/heart-valve-problems-and-causes/problem-aortic-valve-stenosis

19 hours ago Why is there a narrow pulse pressure in aortic stenosis? In aortic stenosis , there is a narrowing of the aortic valve which interferes with the ejection of blood from the left ventricle into the aorta , which results in a decrease in stroke volume and subsequent decrease in pulse pressure .

2.Aortic valve stenosis - Symptoms and causes - Mayo Clinic

Url:https://www.mayoclinic.org/diseases-conditions/aortic-stenosis/symptoms-causes/syc-20353139

28 hours ago  · Aortic stenosis can reduce ventricular stroke volume due to increased afterload (which decreases ejection velocity). The reduced stroke volume decreases the aortic pulse pressure, and the mean aortic pressure will fall if the reduced cardiac output is not offset by an increase in systemic vascular resistance.

3.Aortic Stenosis: What Your Symptoms Mean - WebMD

Url:https://www.webmd.com/heart-disease/aortic-stenosis-stages

23 hours ago Your aortic valve transfers blood from the left ventricle of your heart to your aorta, the largest artery you have. If something causes this valve to narrow, you can’t get as much blood flow to...

4.Physiology, Pulse Pressure - StatPearls - NCBI Bookshelf

Url:https://www.ncbi.nlm.nih.gov/books/NBK482408/

27 hours ago  · In aortic stenosis, there is a narrowing of the aortic valve, which interferes with the ejection of blood from the left ventricle into the aorta, which results in a decrease in stroke volume and a subsequent decrease in pulse pressure. Narrow pulse pressures occur in several diseases such as heart failure (decreased pumping), blood loss (decreased blood volume), …

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