Long-term outcome of fulminant myocarditis as compared with acute (nonfulminant) myocarditis

Area of Science:

• Cardiology
• Internal Medicine
• Pathology

Background:

• Lymphocytic myocarditis can lead to persistent or reversible left ventricular dysfunction.
• Clinical criteria to predict recovery or progression to dilated cardiomyopathy are lacking.
• This study investigates the long-term prognosis of fulminant myocarditis versus acute myocarditis.

Purpose of the Study:

• To compare the long-term prognosis of patients with fulminant myocarditis versus acute myocarditis.
• To determine if fulminant myocarditis is associated with better survival outcomes.
• To identify predictors of long-term outcomes in myocarditis patients.

Main Methods:

• 147 patients diagnosed with myocarditis via endomyocardial biopsy and Dallas criteria were analyzed.
• Fulminant myocarditis was defined by severe hemodynamic compromise, rapid symptom onset, and fever.
• Outcomes (death or heart transplantation) were tracked over an average of 5.6 years.

Main Results:

• 93% of fulminant myocarditis patients survived without heart transplant at 11 years, versus 45% of acute myocarditis patients (P=0.05).
• Fulminant myocarditis independently predicted survival, even after adjusting for clinical and histological factors.
• No significant difference in survival was observed between borderline and active myocarditis based on Dallas criteria.

Conclusions:

• Fulminant myocarditis represents a distinct clinical entity with a favorable long-term prognosis.
• Aggressive hemodynamic support is recommended for patients diagnosed with fulminant myocarditis.
• This finding aids in risk stratification and management of myocarditis patients.