TandemHeart as a Bridge to Recovery in Legionella Myocarditis

Area of Science:

• Infectious Diseases
• Cardiology
• Critical Care Medicine

Background:

• Legionnaires' disease, a pneumonia caused by Legionella bacteria, can present with rare extrapulmonary manifestations, including cardiac involvement.
• Myocarditis, pericarditis, postcardiotomy syndrome, and prosthetic valve endocarditis are known cardiac complications.
• Mechanical circulatory support is established for acute fulminant myocarditis but not specifically for Legionella-associated myocarditis.

Observation:

• A 48-year-old man presented with Legionella myocarditis, characterized by acute left ventricular dysfunction and repolarization abnormalities.
• The patient's condition was severe, necessitating intervention for cardiac support.

Findings:

• The patient received left ventricular unloading via a TandemHeart percutaneous ventricular assist device.
• This intervention facilitated complete recovery of cardiac function.

Implications:

• This case demonstrates the successful use of mechanical circulatory support in treating severe Legionella-associated myocarditis.
• Percutaneous ventricular assist devices may be a viable option for managing infectious myocarditis with acute left ventricular dysfunction.
• Further research into cardiac outcomes and the role of mechanical support in Legionella myocarditis is warranted.