A proportion of DCM are possibly due to persistent viral infection of CVB following an episode of viral myocarditis. nRT-PCR is a very specific and sensitive technique for the diagnosis of viral myocardial disease.

• 一部分 DCM可能是由病毒性心肌炎后CVB持续性感染所致，nRT－PCR法敏感、特异，非常适合病毒性心肌疾病的临床快速诊断。