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Nephrology & Renal Medicine

Renal Artery Stenosis (Atherosclerotic)

ICD-10 Code
I70.1_1

Narrowing of the main renal artery or its branches, 90% caused by atherosclerosis at the ostium. Causes renovascular hypertension (activation of RAAS due to perceived renal ischemia) and ischemic nephropathy.

Clinical Presentation & Protocol

Patient Usually Complains Of

Patient presents with uncontrolled hypertension despite multi-drug regimen, suggestive of renovascular etiology. History significant for atherosclerotic risk factors (smoking, dyslipidemia, DM). Reports of recent decline in GFR, particularly following initiation of ACE inhibitor or ARB therapy. No history of flash pulmonary edema or refractory heart failure.

Clinical Examination Findings

General appearance: Well-nourished, no acute distress. Vital signs: BP elevated in both upper extremities. Skin: Evidence of generalized atherosclerosis (e.g., xanthomas, diminished peripheral pulses). Abdomen: Auscultation reveals a systolic-diastolic abdominal bruit, localized to the epigastrium or periumbilical region, highly specific for renal artery stenosis.

Treatment Protocol

Initiate medical management: Dual/triple antihypertensive therapy including CCB and diuretics. ACE inhibitors/ARBs are contraindicated if bilateral stenosis or solitary kidney is present. Consider statin therapy and antiplatelet agents (aspirin) for atherosclerotic stabilization. Evaluate for revascularization (renal artery stenting) if patient meets criteria for hemodynamically significant stenosis or refractory hypertension.

Detailed clinical guide coming soon.