Cortisol-Induced Tachycardia

Mechanisms and Clinical Context

• Elevated cortisol levels trigger sympathetic nervous system activation, which is the primary mechanism for tachycardia, characterized by increased catecholamine levels and enhanced sympathetic activity, in healthy individuals 1, 2
• The European Society of Cardiology recommends considering the relationship between cortisol and tachycardia in patients with suspected hypercortisolism, as elevated urinary catecholamines and cortisol correlate with increased heart rate and arrhythmia risk 1, 2
• The American Heart Association notes that Cushing's syndrome demonstrates the cardiovascular consequences of chronic cortisol excess, including hypertension, metabolic syndrome, and increased cardiovascular mortality 3

Clinical Implications and Guidelines

• The Endocrine Society suggests screening for autonomous cortisol secretion using 1 mg dexamethasone suppression test if an adrenal incidentaloma is present, in patients with tachycardia and suspected hypercortisolism 6
• The American College of Cardiology recommends monitoring for other manifestations of hypercortisolism, including hypertension, hyperglycemia, and metabolic syndrome, in patients with suspected hypercortisolism 3