-year-old man presented to his personal physician for a yearly
examination. He was totally asymptomatic. Findings of a physical
examination performed 1 year previously were normal, and an ECG
displayed normal sinus rhythm (NSR) and minor nonspecific T-wave
changes. Five years previously, he was found to have mild systemic
hypertension and was administered combined hydochlorothiazide (25
mg) and triamterene (37.5 mg) daily with satisfactory control of the BP
throughout this time period.