FAQ - renal artery obstruction
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What condition results from an obstruction that totally blocks the flow of blood in a coronary artery?

What condition results from an obstruction that totally blocks the flow of blood in a coronary artery?

A. Headache
B. Heart attack
C. Stroke
D. Blindness

Answer is B. Heart attack (Myocardial infarction).
Acute coronary syndromes result from acute obstruction of a coronary artery. Consequences depend on degree and location of obstruction and range from unstable angina to non-ST-segment elevation MI (NSTEMI), ST-segment elevation MI (STEMI), and sudden cardiac death. Symptoms are similar in each of these syndromes (except sudden death) and include chest discomfort with or without dyspnea, nausea, and diaphoresis. Diagnosis is by ECG and the presence or absence of serologic markers. Treatment is antiplatelet drugs, anticoagulants, nitrates, β-blockers, and, for STEMI, emergency reperfusion via fibrinolytic drugs, percutaneous intervention, or, occasionally, coronary artery bypass graft surgery.  (+ info)

can you give me the circulation from renal artery to the renal veins? on the kidney?

can you give me the circulation from renal artery to the renal veins? on the kidney?

It depends on how many steps you want:

A not-too-detailed version:
renal artery -> interlobar artery -> arcuate artery -> interlobular artery -> afferent arteriole -> glomerulus -> efferent arteriole -> peritubular capillary (or vasa recta, depending on if you are in the renal cortex or the medulla) -> interlobular vein -> interlobar vein -> renal vein  (+ info)

What is the prognosis for renal artery stenosis?

My future mother in law was just told that she had a narrowing artery in her kidney. She's been having unexplained high blood pressure and panic attacks which prompted her to go to the doctor for tests, and found this out. They told her that she would need some stenting done. What is the prognosis for this? She is in her mid 40's and overall in good health, never been a smoker.
I already know *about* the condition, but I can't seem to find any information about a prognosis...which is what I'm asking about for any one who may have familiarity on the subject.

See Merck Medical manuals online, on this subject:

and try a search at the Natl Institute of Diabetes and Digestive and Kidney Diseases, both for answers and experts
http://www2.niddk.nih.gov/  (+ info)

What is done if accessory renal artery causes hypertension in 14 year old?

The accessory renal artery is long and flat & if taken out that part of the kidney will die!!! Are they crazy?

The renal arteries normally arise off the side of the abdominal aorta, immediately below the superior mesenteric artery, and supply the kidneys with blood. Each is directed across the crus of the diaphragm, so as to form nearly a right angle with the aorta.

The renal arteries carry a large portion of total blood flow to the kidneys. Up to a third of total cardiac output can pass through the renal arteries to be filtered by the kidneys.

The arterial supply of the kidneys is variable and there may be one or more renal arteries supplying each kidney. It is located above the renal vein.
Asymmetries before reaching kidney
Due to the position of the aorta, the inferior vena cava and the kidneys in the body, the right renal artery is normally longer than the left renal artery.

The right passes behind the inferior vena cava, the right renal vein, the head of the pancreas, and the descending part of the duodenum.
The left is somewhat higher than the right; it lies behind the left renal vein, the body of the pancreas and the lienal vein, and is crossed by the inferior mesenteric vein.

At kidney
Before reaching the hilus of the kidney, each artery divides into four or five branches; the greater number of these lie between the renal vein and ureter, the vein being in front, the ureter behind, but one or more branches are usually situated behind the ureter.

Each vessel gives off some small inferior suprarenal branches to the suprarenal gland, the ureter, and the surrounding cellular tissue and muscles.

One or two accessory renal arteries are frequently found, more especially on the left side they usually arise from the aorta, and may come off above or below the main artery, the former being the more common position. Instead of entering the kidney at the hilus, they usually pierce the upper or lower part of the gland.

Diseases of the renal arteries
Renal artery stenosis, or narrowing of one or both renal arteries will lead to hypertension as the affected kidneys release renin to increase blood pressure to preserve perfusion to the kidneys. RAS is diagnosed with an MRA (magnet-resonance scan) of abdomen. It is treated with the use of balloon angioplasty and stents, if necessary.

Atherosclerosis can also affect the renal arteries and can lead to poor perfusion of the kidneys leading to reduced kidney function and, possibly, renal failure.  (+ info)

What if an accessory renal artery can't be stented?

If the accessory renal artery is too long and flat but is causing hypertension, what is usually done?


• Two surgical procedures that your physician may use to treat renal artery stenosis are endarterectomy and surgical bypass.

• In a renal endarterectomy, a vascular surgeon removes the inner lining of your renal artery, which contains the plaque. This removes the plaque and leaves a smooth, wide-open artery.

• Bypass surgery creates a detour around the narrowed or blocked sections of your renal artery.

• To create this bypass, a vascular surgeon connects one of your veins or a tube made from man-made materials above and below the area that is blocked. This creates a new path for your blood to flow to your kidneys.

• The choice of the procedure that is best for your situation depends upon the extent and location of the blockages

Good Luck  (+ info)

Could an obstruction in the artery that goes to your arm, cause you not to feel cold?

I have known blockages in both arms. The Heart Doc tried to explain it to me but it is still a mystery to me. He said that the same artery that feeds my arms feeds the back of my brain. So I am wondering if the blockage has increased, could this be the cause of me being unable to feel cold?

not likely maybe you are just very resilient to coldness, but it may be possible  (+ info)

What is the first major branch of renal artery?

What is the first major branch of renal artery?

A) Segmental
B) Arcuate
C) Cortical Radiate
D) Interlobular


http://www.kidneyatlas.org/book2/adk2_01.pdf  (+ info)

what is the difference Between the renal vein and the renal artery ?

which one carries the dirty blood and witch one carries the clean blood through out the body?

please help I have been researching for days and I still cant find out

for a project on the excertory system

RENAL VEIN = are veins that drain the kidney. They connect the kidney to the inferior vena cava (the large vein that carries de-oxygenated blood from the lower half of the body into the right atrium of the heart).

RENAL ARTERY = supply the kidneys with blood. They carry a large portion of total blood flow to the kidneys. Up to a third of total cardiac output can pass through the renal arteries to be filtered by the kidneys.

Arteries = has thick intermediate layers of elastic and mascular fibers. They are blood vessels that carry blood away from the heart. All arteries, with the exception of the pulmonary and umbilical arteries, carry oxygenated blood.

Veins = intermediate layers of elastic and muscular fibers are less developed. They are blood vessels that carries blood back toward the heart. Exceptions can be found in the portal system associated with the blood supply of the GI tract. The superior mesenteric, inferior mesenteric and splenic veins form the hepatic portal vein which carries blood from the lower GI tract to the liver.  (+ info)

What will a partial obstruction in a coronary artery likely cause?

a. pulmonary embolus
b. hypertension
c. angina attack
d. myocardial infarction


Can we do all of your homework for you?  (+ info)

Can you help me with my A&P question? Its about renal artery stenosis?

I need to know why RAS causes high blood pressure. I also need to know the effects it would have on blood levels of potassium, sodium, aldosterone, angiotensin II, and renin. I really appreciate any help! Thanks!

Ok, here it goes! In RAS, the kidney is basically being starved for blood. When a stenosis is present, the pressure distal to the stenosis drops significantly. Essentially, the kidney is fooled into thinking the blood pressure is low in the entire body instead of just the kidney itself. In response to the low pressure in the renal artery, the kidney releases Renin, which in turn causes a rise in Angiotensin II and Aldosterone. Angiotensin II is the bad guy in renal-induced hypertension because it signals the kidney to retain water by reducing the amount of filtration in the glomerulus (causing the high BP!) Aldosterone is made in response to the high Renin and Angiotensin II levels; it raises blood pressure by signalling the kidney to retain sodium. When sodium is retained, so is water (due simply to osmotic forces). This is where you need to be careful -- just because sodium is retained in the kidney tissues, it doesn't mean it is retained in the blood. Due to the extra volume of water being retained, the sodium in the blood is diluted, so its concentration goes down ever so slightly.

As far as potassium, it's levels decrease in the blood (due to Aldosterone) because for every molecule of Sodium you retain, you lose one molecule of Potassium in the urine.

Hope this is what you need!  (+ info)

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