“…Using a chronologic ap proach, Burch and Ray [7], in 1948, divided myocarditis into acute and chronic forms, differing in 'degree and/or severity of muscle destruction, rapidity of course, severity of clinical manifestations and gravity of prog nosis'. Similarly, Lustock et al [33] classi fied myocarditis by clinical course into acute, subacute, recurrent, and chronic (per sistent) types that had varied pathology. The subacute stage included lymphocytes, mono cytes, and areas of early fibrosis.…”