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Viral Myocarditis 附一儿科 林洁英 Introduction  Myocarditis: Myocarditis is defined as inflammatory changes in the heart muscle and is characterized by myocyte.

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Presentation on theme: "Viral Myocarditis 附一儿科 林洁英 Introduction  Myocarditis: Myocarditis is defined as inflammatory changes in the heart muscle and is characterized by myocyte."— Presentation transcript:

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2 Viral Myocarditis 附一儿科 林洁英

3 Introduction  Myocarditis: Myocarditis is defined as inflammatory changes in the heart muscle and is characterized by myocyte necrosis.There are all kinds of causes and viral infections are the most common cause.

4 Etiologies and Pathogenesy  Virus infection: The most common causes of myocarditis are coxsackie A and B, echovirus,adenovirus and cytomegalovirus.  Directly damage  Auto-immunoreaction

5 Clinical manifestation  Symptoms: The presentation depends on the patient ’ s age and the acute or chronic process. fatigue, pale, chest malaise, myalgias, bellyache etc. Severe case: CHF, severe cardiac arrhythmia, cardiogenic shock, sudden death etc.  Signs: tachycardia, cardiac dilatation, heart sounds may be muffled and distant, gallop, signs of CHF and signs of cardiogenic shock.

6  Cardiac enzyme levels: CPK, LDH, CK-MB, cTnT 、 cTnI  Electrocardiogram: cardiac arrhythmia — premature beat, tachycardia, AV block, ST-T  Chest radiography: large cardiac sihouette, pulmonary venous congestion, edema Auxiliary Examination

7  Echocardiography: cardiomegaly, ventricular disfunction, heart function↓ pericardial effusion ect.  Virology examination : viral isolation, specific antibody, PCR identification of a viral infection, myocardial biopsy etc.

8 Diagnosis Diagnosis may require blood tests, a chest X-ray, electrocardiogram or radionuclide angiocardiogram, and, in rare cases, biopsy of a tissue sample from the heart muscle.

9 Diagnosis  Clinical Findings 1. heart disfunction, cardiogenic shock or cardio-cerebral syndrome 2.cardiac dilatation ( chest radiography, echocardiography ) 3. change of electrocardiogram 4. CK-MB↑or cTnT(+) 、 cTnI(+)

10 诊断 心电图改变:以 R 波为主的 2 个或 2 个以上 主要导联的 ST-T 改变持续 4 天以上伴动态 变化;窦房、房室传导阻滞,完全右或 左束支传导阻滞;成联律、多源、多型、 成对或并行早搏;非房室结、房室折返 引起的异位心动过速;低电压、异常 Q 波。

11 Diagnosis  Pathogenies 1. Diagnosis indexes: from endocardium, myocardial tissue, or pericardial fluid  Viral isolation  PCR identification of a viral infection  Specific antibody

12 Diagnosis  Pathogenies 2. Referenced diagnosis indexes  viral isolation from stool, blood etc  IgM(+)  PCR identification of a viral infection from blood

13 Diagnosis  Diagnosis guidelines 1. Clinical diagnosis of myocarditis: 2 clinical findings 2. Diagnosis of viral myocarditis: 2 clinical findings + 1 pathogenies of diagnosis indexes 3. Clinical diagnosis of viral myocarditis: 2 clinical findings + 1 pathogenies of referenced diagnosis indexes

14 Diagnosis  Exclusion: rheumatism myocarditis toxic myocarditis congenital heart diseases cardiomyopathy endocardial fibroelastosis congenital AV block etc.

15 Stages  Acute phase: <6m  Deferable phase: 6m~1y  Chronic phase: >1y

16 Treatment  Rest: 3-4w, HD or HF 3-6m.  Protect cardiac muscle  Antioxidant: VitC, CoQ10, VitE  Antivirus  Corticosteroids and immunosuppression  Others

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