Sudden Muscle Weakness? It Might Not Be Fatigue—But Primary Aldosteronism!

A 45-year-old woman with a history of hypertension recently experienced repeated fatigue and muscle weakness. Her tests showed low potassium (2.7mmol/L) along with high blood pressure. Further evaluation revealed Primary Aldosteronism (PA)—a common but often overlooked cause of secondary hypertension.

🔎 What is PA?
It’s a condition where the adrenal glands produce too much aldosterone, leading to:

• Sodium retention & potassium loss
• Persistent or resistant hypertension
• Low potassium symptoms: weakness, periodic paralysis, difficulty swallowing, even breathing issues in severe cases.

📌 Causes include:

• Aldosterone-producing adenoma (most common)
• Bilateral adrenal hyperplasia
• Rare adrenal carcinoma or genetic/familial cases

✅ Diagnosis involves:

• Blood & urine tests: low potassium, high aldosterone, suppressed renin
• Adrenal vein sampling (AVS): gold standard
• Imaging (CT/Ultrasound): to detect adrenal tumors

⚠️ Key takeaway:
If you have hypertension with unexplained fatigue or low potassium, don’t dismiss it as overwork—ask your doctor about PA. With proper treatment, many patients can be cured or effectively managed.