Actinomyces meyeri Causing Tamponade and Constrictive Pericarditis

Actinomycosis pericarditis is a rare infection, with only 19 reported cases since 1950, almost all caused by Actinomyces israelii. These patients often present with symptoms of heart failure, but myocardial involvement isunusual. We present a unique case of pericarditis due to Actinomyces meyeri, resulting in tamponade and constriction requiring pericardial stripping, complicated by persistent left ventricular dysfunction.