Isolated myocarditis, also known as Fiedler's myocarditis, is a condition unrelated to other disease processes found at necropsy across all age groups.
Non-specific myocarditis is recognized in an increasing variety of conditions. However, myo- carditis that appears to be unrelated to any other disease process is still occasionally found at necropsy. It occurs in persons of all ages, from the newborn to the very old, and is commonly known as Fiedler's myocarditis after the author who first described it in 1899. Later writers have used a variety of other names, the commonest being "isolated"
R. Whitehead (Mon,) studied this question.