Renal Artery Stenosis (Bilateral)

Renal artery stenosis (bilateral) is a condition where both arteries supplying blood to the kidneys become narrowed. This narrowing affects the kidneys' ability to receive enough blood, which can lead to problems with how the kidneys work. The kidneys play a key role in controlling blood pressure and filtering waste from the blood. When blood flow is reduced, the kidneys may release hormones that cause high blood pressure and fluid retention. This condition can lead to symptoms like high blood pressure that is hard to control and sometimes kidney damage. It mainly affects the circulatory system and the renal system. Early detection is important to prevent complications related to kidney function and blood pressure.

Renal artery stenosis (bilateral) is defined as the narrowing of both renal arteries, typically caused by atherosclerosis or less commonly by fibromuscular dysplasia. This stenosis leads to decreased renal perfusion, activating the renin-angiotensin-aldosterone system (RAAS), which results in secondary hypertension and volume retention. Bilateral involvement is particularly significant because it can cause ischemic nephropathy and progressive chronic kidney disease due to reduced glomerular filtration. The condition is a major cause of refractory hypertension and may present with azotemia or worsening renal function, especially after starting angiotensin-converting enzyme inhibitors (ACEi) or angiotensin receptor blockers (ARBs). Diagnosis and management are critical to prevent irreversible renal damage and cardiovascular complications.