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Diastolic heart failure after acute myocarditis, a new discovery in inflammatory cardiomyopathies?
  1. Casper Eurlings1,
  2. Stephane Heymans1,2
  1. 1Department of Cardiology, Maastricht University Medical Center, Maastricht, The Netherlands
  2. 2Center for Heart Failure Research, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, The Netherlands
  1. Correspondence to Prof Dr Stephane Heymans, Center for Heart Failure Research, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre, P Debyelaan 25, Maastricht 6229 HX, The Netherlands; s.heymans{at}

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Corvisart introduced the term ‘myocarditis’ in 1812,1 but it would take up to 1987 before the Dallas classification was accepted for standardising the diagnostic criteria.2 The gold standard for diagnosis now is endomyocardial biopsy (EMB), combining the Dallas criteria with immunohistochemistry for inflammation and PCR for the detection of viruses (reviewed in Dennert et al),3 according to the 1995 WHO classification of cardiomyopathies.4 Of all patients with myocarditis 20% or more will develop dilated cardiomyopathy (DCM),5 which is induced by chronic inflammation or viral persistence after initial acute myocarditis (AMC).6 A high prevalence of parvovirus B19 (PVB19), human herpes virus 6 or the combination of the two viruses exists in patients with ‘idiopathic’ DCM, suggesting that the persistence of these viruses may relate to a worse prognosis.3 5 6 The type of clinical presentation plays an important role in the prognosis; heart failure-like symptoms would have a higher mortality than infarct-like symptoms.5 Patients with recovered left ventricular ejection fraction are always thought to maintain their normalised cardiac function. They are discharged from follow-up or medical treatment, and data on the progression of cardiac function and long-term prognosis of these patients are lacking. The present study challenges this approach.

The study by Escher et al,7 published in this issue of Heart (see page 709), prospectively studied 50 patients with AMC, which all underwent EMB irrespective of their cardiac function. They examined their …

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  • Linked articles 199489.

  • Funding This work was supported by Vidi grant of the Netherlands Organisation for Scientific Research and research grants of the Netherlands Heart Foundation (SH) (NHS 2007B036, 2008B011).

  • Competing interests None.

  • Provenance and peer review Commissioned; not externally peer reviewed.

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