Eosinophilia and Ulcerative Colitis Associated with Eosinophilic Myocarditis

Area of Science:

• Cardiology
• Gastroenterology
• Hematology

Background:

• Reactive eosinophilia is commonly linked to inflammatory bowel disease.
• Eosinophilic myocarditis is a rare but serious cardiac condition.
• The interplay between gastrointestinal inflammation and cardiac eosinophilic infiltration requires further investigation.

Observation:

• A 42-year-old male presented with hypovolemic shock due to diarrhea and diagnosed nonischemic cardiomyopathy.
• Marked peripheral eosinophilia was detected, prompting further cardiac and gastrointestinal evaluation.
• Despite ulcerative colitis diagnosis in colonic biopsies, no eosinophils were found in the colon.

Findings:

• Cardiac magnetic resonance imaging and endomyocardial biopsy confirmed eosinophilic myocarditis.
• Hematologic workup excluded other causes of eosinophilia.
• Corticosteroid treatment resolved diarrhea but did not immediately improve ejection fraction.

Implications:

• This case underscores the importance of considering eosinophilic myocarditis in patients with unexplained cardiomyopathy and peripheral eosinophilia, even in the presence of inflammatory bowel disease.
• Early diagnosis and treatment of eosinophilic myocarditis are crucial for potential cardiac function recovery.
• Further research is needed to elucidate the mechanisms linking gastrointestinal inflammation and eosinophilic heart disease.