Can Steroids Cause Tachycardia?
Yes, both anabolic steroids and glucocorticoids can cause tachycardia, though through different mechanisms and clinical presentations.
Anabolic Steroids and Tachycardia
Anabolic androgenic steroids directly cause cardiovascular complications including tachycardia and tachyarrhythmias. The evidence shows:
Anabolic steroids induce cardiomyopathy with associated tachycardia as a presenting symptom 1. A 53-year-old bodybuilder presented with tachycardia on physical examination alongside severe cardiomyopathy (EF 15%) from intramuscular anabolic steroid use, which reversed after discontinuation 1.
Severe tachyarrhythmias requiring cardioversion have been documented in patients using anabolic steroids long-term 2. A 45-year-old bodybuilder with long-term anabolic steroid abuse presented with acute severe tachyarrhythmia requiring multiple direct current cardioversions 2.
Atrial fibrillation (a form of tachyarrhythmia) occurs with anabolic steroid use 3. Young bodybuilders consuming large doses have presented to emergency departments with symptomatic rapid atrial fibrillation 3.
The mechanism involves androgen-induced structural cardiac changes (hypertrophic cardiomyopathy, septal hypokinesis), polycythemia, platelet hyper-aggregability, and vascular injury 4. These are dose-dependent effects seen primarily with supraphysiologic doses used for bodybuilding.
Glucocorticoids and Tachycardia
Glucocorticoids cause tachycardia through two distinct pathways:
1. Direct Cardiomyopathy (Chronic High-Dose Use)
Long-term high-dose glucocorticoid therapy (≥15 mg/day prednisolone equivalent for >20 years) can cause glucocorticoid-induced cardiomyopathy with associated tachycardia 5. This mimics the cardiovascular effects seen in Cushing's syndrome, including left ventricular dysfunction that can present with compensatory tachycardia.
2. Adrenal Crisis (Acute Presentation)
When patients on chronic glucocorticoids develop adrenal insufficiency or crisis, tachycardia is a key manifestation of hemodynamic instability 6. The 2024 European Society of Endocrinology/Endocrine Society guidelines emphasize that patients with current or recent glucocorticoid use presenting with hemodynamic instability should be considered for adrenal crisis regardless of glucocorticoid type, dose, or route of administration 6.
Clinical Pitfalls to Avoid
Don't dismiss tachycardia in bodybuilders or athletes as deconditioning—always inquire about anabolic steroid use, as this is a reversible cause of severe cardiomyopathy 1.
Don't assume only oral or high-dose glucocorticoids cause problems—even inhaled, intranasal, intra-articular, and topical routes can suppress the HPA axis and lead to adrenal crisis with tachycardia 6.
Don't overlook adrenal crisis in patients with recent glucocorticoid discontinuation—tachycardia with hemodynamic instability warrants immediate parenteral glucocorticoid treatment and fluid resuscitation 6.
Recognize that anabolic steroid-induced cardiac effects are often reversible—discontinuation led to normalization of cardiac function in documented cases 1, 5.
Key Distinguishing Features
| Feature | Anabolic Steroids | Glucocorticoids |
|---|---|---|
| Primary mechanism | Cardiomyopathy, arrhythmias | Cardiomyopathy (chronic) or adrenal crisis (acute) |
| Typical patient | Young bodybuilders, athletes | Patients on chronic immunosuppression |
| Reversibility | Often reversible with cessation | Variable; adrenal crisis reversible, cardiomyopathy may improve |
| Associated findings | Elevated testosterone, structural heart changes | Cushingoid features (chronic) or hypotension/shock (acute) |