AKT-4674
A 26-year-old woman presents to her GP with complaints of constant fatigue and muscle weakness for the past 4 months. She has no significant medical history and is a non-smoker with a healthy weight. On examination, her blood pressure is found to be consistently high at 160/95 mmHg. However, there are no other significant findings on physical examination. Her blood sugar levels are normal, but her potassium levels are low at 3.4 mmol/L. The GP suspects primary hyperaldosteronism and plans to refer the patient to secondary care. What is the most appropriate initial investigation for this case?