Some relevant biochemical tests conducted while evaluating for the cause of recurrent episodic hypertension in the patient
| Test | Result | Reference range | Comment |
| 24-hour urine norepinephrine (nmol/24 hours) | 2206 | 0–570 | Elevated |
| 24-hour urine dopamine (nmol/24 hours) | 1906 | 0–2500 | Within reference limits |
| 24-hour urine cortisol (nmol/24 hours) | 100 | 0–200 | Within reference limits |
| 24-hour urine creatinine (nmol/24 hours) | 12.4 | 7–13 | Within reference limits |
| Plasma renin activity (ng/mL/hour) | 1.1 | 0.5–3.5 | Within reference limits |
| Plasma aldosterone level (erect) (pmol/L) | 220 | 90–700 | Within reference limits |