Renal Artery Stenosis

Question 1

Definition.

Answer 1

Decreases blood flow to the juxtaglomerular apparatus which results in activation of the renin angiotensin aldiosterone system leading to HTN.

Decreased renal artery blood flow -> Results to decreased gfr -> stimulation of RAAS -> HTN (factor for renal disease)

Question 2

Etiology

Answer 2

Atherosclerosis

Fibromuscular dysplasia

Question 3

Symptoms.

Answer 3

Hypertension
Decreased renal function
Abdominal bruit

Question 4

Diagnosis

Answer 4

Duplex Doppler US
Renal arteriogram
Magnetic Resonance Angiography

Question 5

Treatment.

Answer 5

Revascularization with precutaneous transluminal renal angioplasty ( ptra)

• surgery
• ace inhibitors (enalapril, captopril 25-50mg, ramipril 5-10mg)
• calcium channel blockers ( verapamil 40-80mg, nifedipine 30-60mg)