The renal arteries normally arise off the left interior 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.The renal artery is a blood vessel that carries oxygenated blood from the heart to the kidneys. It branches off the aorta and travels into the kidney through the hilum. From there it branches further to supply blood to the interior components of the kidney.
Symptoms. A partial blockage of the renal arteries usually does not cause any symptoms. If blockage is sudden and complete, the person may have a steady aching pain in the lower back or occasionally in the lower abdomen. A complete blockage may cause fever, nausea, vomiting, and back pain.The right renal artery originates from the anterolateral aspect of the aorta and runs in an inferior course behind the inferior vena cava to reach the right kidney, while the left renal artery originates slightly higher and from a more lateral aspect of the aorta, and runs almost horizontally to the left kidney.
Narrowing of the renal artery, due to atherosclerosis or, rarely, fibromuscular dysplasia, leads to reduced renal perfusion. ... Although these features may be reversed by correcting the stenosis, a classic presentation is uncommon, and hypertension is rarely cured in patients with atheromatous renal artery stenosis.