Malignant hypertension laboratory findings

• Complete blood count
• Electrolytes

• Coagulation profile

• Urinalysis

• Cardiac enzymes

• urinary catecholamines

• Thyroid-stimulating hormone (TSH)

• 24-hour urine collection for vanillylmandelic acid (VMA) and catecholamines.
• BUN, creatinine

Urinalysis may reveal

• Proteinuria

• Microscopic hematuria

• RBC or hyaline casts.

In patients with hyperaldosteronism (a secondary cause of hypertension), aldosterone promotes renal potassium wasting, resulting in low serum potassium.

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