Treatment of Lyme Disease with Orthostatic Symptoms

Initial Assessment and Cardiac Evaluation

The American College of Rheumatology recommends obtaining an ECG in any patient with Lyme disease who has lightheadedness, syncope, palpitations, dyspnea, chest pain, or edema 1, 2
The 2020 IDSA/AAN/ACR guidelines specifically recommend ECG for patients with signs or symptoms consistent with Lyme carditis, and orthostatic symptoms fall into this category 1
Admit patients with PR interval >300 milliseconds, other arrhythmias, or clinical manifestations of myopericarditis for continuous cardiac monitoring, based on a strong recommendation due to the risk of severe cardiac complications including complete heart block 1, 2

The Infectious Diseases Society of America recommends using oral antibiotics: doxycycline 100 mg twice daily, amoxicillin 500 mg three times daily, cefuroxime axetil 500 mg twice daily, or azithromycin for stable outpatients with Lyme carditis and orthostatic symptoms 1, 3
Treat patients with Lyme carditis for 14-21 days total 1, 2, 3
For hospitalized patients with Lyme carditis, start IV ceftriaxone (1-2 g daily) until clinical improvement, then switch to oral antibiotics to complete 14-21 days total 1, 2, 3
Use temporary pacing rather than permanent pacemaker for symptomatic bradycardia that cannot be managed medically 1, 3, 4

Do not prescribe additional antibiotics for patients with persistent nonspecific symptoms (fatigue, cognitive dysfunction, orthostatic intolerance) following standard Lyme disease treatment who lack objective evidence of reinfection or treatment failure, based on a strong recommendation and moderate-quality evidence 1, 3, 5
The key distinction is that objective signs of active infection (such as PR prolongation, elevated cardiac biomarkers, pericardial effusion, or active arthritis) warrant antibiotic treatment, while subjective symptoms alone do not 1, 5

Increase fluid intake to 2-3 liters daily for patients who develop orthostatic hypotension or POTS after treated Lyme disease 5

Do not dismiss orthostatic symptoms in Lyme disease patients as benign without cardiac evaluation - these may represent life-threatening Lyme carditis requiring immediate treatment 1, 2
Do not continue antibiotics indefinitely for post-treatment orthostatic symptoms - this represents autonomic dysfunction, not active infection, and requires symptomatic management rather than antimicrobial therapy 1, 5
Do not place permanent pacemakers in acute Lyme carditis - conduction abnormalities typically resolve with antibiotic treatment, and temporary pacing is sufficient 1, 3, 4