Atherosclerotic renal artery disease is common among patients with hyperten
sion over the age 50 years who are resistant to medical treatment. In this
case report, the authors present a 55-year-old woman with unilateral renal
artery stenosis with a history of cardiac arrest. QT prolongation and evide
nt hypokalemia were the main clinical findings of the patient. The patient
also had an episode of polymorphic ventricular tachycardia during hospitali
zation that degenerated into ventricular fibrillation. After successful bal
loon dilation of the stenotic renal artery, the patient stayed normotensive
and normokalemic without medication, and no arrhythmia was observed during
the 6-month follow-up period.