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An unexpected rise in cardiac troponin I in a patient with multiple myeloma
  1. Olivia Domanski1,
  2. Sylvestre Maréchaux1,
  3. Gerard Forzy2,
  4. Jean-Michel Lemahieu1
  1. 1Department of Cardiology, Groupement Hospitalier de l'Institut Catholique de Lille/Faculté libre de médecine, Lomme, France
  2. 2Department of Biochemistry, Groupement Hospitalier de l'Institut Catholique de Lille/Faculté libre de médecine, Lomme, France
  1. Correspondence to Dr Sylvestre Maréchaux, sylvestre.marechaux{at}yahoo.fr

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A 62-year-old patient was admitted to our department for fatigue and chest discomfort. He had a history of multiple myeloma and systemic hypertension. Blood pressure, heart rate and physical examination were unremarkable. ECG demonstrated a normal sinus rhythm with a right bundle branch block (figure 1). Blood was sampled and cardiac troponin (cTn) I was persistently increased from 2.8 to 3 ng/ml (Beckman Coulter Access II and DXi 800 platforms, Beckman Coulter Inc, Fullerton, California, USA). Left ventricular ejection fraction was normal at 0.60 with a trace of aortic regurgitation at transthoracic Doppler echocardiography. Coronary angiography revealed the absence of significant luminal narrowing on …

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