Symptom improvement in postural orthostatic tachycardia syndrome with the sinus node blocker ivabradine

Abstract

Here, we present a patient diagnosed with chronic fatigue syndrome/myalgic encephalomyelitis at the age of 15. She presented at that age with sudden onset of symptomatic palpitations after a viral illness. Over a period of days, she subsequently developed debilitating fatigue. Thyroid function tests and catecholamines were normal. Twelve lead ECG confirmed sinus tachycardia.