A 48-year-old man with newly diagnosed hypertension is referred for an echocardiogram to assess findings of left ventricular hypertrophy noted on the electrocardiogram. He is asymptomatic, and his medical history is unremarkable other than hypertension. His only medication is chlorthalidone.
On physical examination, blood pressure is 128/70 mm Hg, pulse rate is 60/min and regular, and respiration rate is 18/min. BMI is 24. The cardiac examination is normal other than the presence of an S4.
The transthoracic echocardiogram demonstrates normal left ventricular size, function, and mass index. An atrial septal aneurysm with a small left-to-right shunt indicative of a patent foramen ovale is noted by color-flow Doppler imaging. The right ventricular chamber size, systolic function, and estimated pressures are normal.
Which of the following is the most appropriate management based on this patient's echocardiographic findings?