Objective To summarize the basic syndromes

syndrome factors

and syndrome distribution of viral myocarditis.Methods All the literature on viral myocarditis during January 1978 to January 2010 in the CNKI database was searched and 30 of them up to the standard of enrolment were obtained.The syndrome factors from the enrolled were extracted and classified to summarize the syndromes.Results A total of 9 syndrome factors were found out from 1 439 viral myocarditis cases

and the main ones were qi deficiency in 659 cases（45.80%）

yin deficiency in 652 cases（45.31%）

and toxin-based heat（fire）in 403 cases（28.01%）.There were all together 28 syndromes

and the important ones were qi and yin deficiency in 453 cases（31.48%）and evil pathogen invading the heart in 195 cases（13.55%）.Of all the cases

deficiency syndrome realized in 774 cases（53.79%）

complicated syndrome of deficiency with excess appeared in 170 cases（11.81%）

and excess syndrome existed in 495 cases（34.40%）.Qi deficiency and yin deficiency were the deficiency syndrome factors

while the toxin-based heat（fire）

blood stasis

and phlegm（damp）turbidity were the excess syndrome factors.Conclusion Qi deficiency

yin deficiency

toxin-based heat（fire）

blood stasis

and phlegm（damp）turbidity are the important syndrome factors of viral myocarditis.Evil toxin-based（wind

heat）virus invading the heart complicated with blood stasis and phlegm damp which are associated with qi and yin deficiency and both qi and yin deficiency complicated with blood stasis and phlegm damp which are associated with yang deficiency and blood deficiency are the main basic syndromes of viral myocarditis.