Resistant hypertension is defined as poorly controlled status of blood pressure despite of optimal use of three or more
antihypertensive drugs of different classes, including diuretics. Although exact prevalence of resistant hypertension is not
known, it has been reported to be 12.8% among patients treated with antihypertensive drugs. It is important to evaluate
a possible secondary cause in patients with resistant hypertension. We report a case of resistant hypertension with renal
artery segmental stenosis that was not revealed in renal Doppler study. Blood pressure of the patient was well controlled
after renal balloon angioplasty.