Why does renal or aortic stenosis usually cause hypotension?

They don't. Renal artery stenosis usually causes hypertension. In fact it can be difficult to control. Aortic stenosis doesn't cause hypotension until very late which can be dangerous if the heart has thickened. In my experience most of my patients with aortic stenosis have either normal or high blood pressure.
Renal stenosis. Renal artery stenosis causes high blood pressure, hypertension, due to a hormone produced by the affected kidney. But aortic stenosis causes the opposite, hypotension, due to the low amount of blood released through the heart valves into the aorta.

Related Questions

CXR's show mild cardiamegaly 4 many yrs. Could it with Type II DM & Asthma cause Mod. Aortic Stenosis &? Mild hypokensis of Apex. This DX A.S/HA new

Probably not. Aortic stenosis itself can cause increased heart size (cardiomegaly) as it progresses. Diabetes plus aortic stenosis does increase the risk of reduced blood flow to parts of the heart. This can lead to reduced motion (hypokinesis). Severe asthma can cause enlargement of the right side of the heart, but if you have your asthma under good control, this is not contributing much to your situation. Read more...
Possibly. It would make more sense for the cardiomegaly to result from aortic stenosis because the heart would build up muscle of the left ventricle pumping against the stenosis to get blood to the rest of the body, but they may be unrelated. Hypokinesis may represent ischemia or lack of adequate oxygen to your inferior heart. Diabetes certainly plays a role in heart disease especially atherosclerosis. Read more...

Can aortic stenosis cause chest pain in a 5yo?

Rarely. Less than 10% of children with significant aortic stenosis have chest pain. Typically aortic stenosis is recognized by the presence of a heart murmur and intervention is undertaken before symptoms develop. Read more...
Yes but it's unusual. Aortic stenosis (as) is narrowing of the valve leading from the heart to the body, and usually causes no symptoms in children unless it is quite severe. In a small fraction of children, severe as can result in shortness of breath, fatigue, swelling, chest pain or fainting. However, most cases of chest pain in children are not caused by heart problems. A pediatric cardiologist can sort it out. Read more...
It depends.... Hello sophia, if the aortic stenosis is significant it can cause chest pain even a 5 year old because the heart muscle is working harder to pump blood. Typically the aortic stenosis would be treated with balloon dilatation or surgery (valvuloplasty or a ross procedure). Read more...

What causes a fever when my child has aortic stenosis?

Many thigns. Fever is the body's response to a viral or bacterial infection. Sometimes medications can cause drug fever but an infection is more likely. Having aortic stenosis doesn't change what causes fevers. When one has a heart valve problem it just prompts quick investigation and evaluation. Read more...
Normal things. A child with aortic stenosis can get sick like anyone else. The most important thing is prolonged fever may be an indication of endocarditis (heart valve infection). If fever is persistent then blood cultures should be done. Read more...
Many Things. Fevers in children can be caused by many things. Simply having as does not make additional things potentially cause a fever. However, if your child has prolonged or unexplained fevers, then seek attention (preferably with the cardiologist) as it could be a sign of a serious (but rare) valve infection. Please discuss your specific issues with your cardiologist. Read more...

New diangosis Mod. Aortic Stenosis &?? Mild Hypokensis Apex. On 2nd puff MDI I passed out on PFT. Could new diangosis cause my passing out? Tech didn't report it.

Yes, aortic. valve stenosis can cause syncopal episodes. Loss of consciousness is an important potentially serious symptom. You need to discuss proper diagnosis and treatment with your physician and cardiologist. Read more...

What could cause an aortic stenosis with apico-aortic conduit?

Calcium. This operation is rarely used but is done when the ascending aorta is too calcified to operate on. Read more...