Diagnosis and Treatment of Viral Myocarditis

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Diagnosis and Treatment of Viral Myocarditis Jason C. Schultz, MD, Anthony A. Hilliard, MD, Leslie T. Cooper, MD, Charanjit S. Rihal, MD Mayo Clinic Proceedings Volume 84, Issue 11, Pages 1001-1009 (November 2009) DOI: 10.4065/84.11.1001 Copyright © 2009 Mayo Foundation for Medical Education and Research Terms and Conditions

FIGURE 1 Electrocardiograms. Left, At hospital admission, sinus tachycardia at 130 beats/min, with diffuse ST-segment elevation and 1.0 mm of PR-segment depression in leads I and II. Right, Two days after admission, normal sinus rhythm at 85 beats/min and resolution of ST-segment abnormalities. Mayo Clinic Proceedings 2009 84, 1001-1009DOI: (10.4065/84.11.1001) Copyright © 2009 Mayo Foundation for Medical Education and Research Terms and Conditions

FIGURE 2 Echocardiograms. At hospital admission, parasternal long-axis view showing ventricular diastole (upper left) and systole (upper right) with an estimated ejection fraction of 20% and a small pericardial effusion (arrow). Two months after admission, parasternal long-axis view showing ventricular diastole (bottom left) and systole (bottom right) with an estimated ejection fraction of 55%. Ao = aorta; LA = left atrium; LV = left ventricle; RV = right ventricle. Mayo Clinic Proceedings 2009 84, 1001-1009DOI: (10.4065/84.11.1001) Copyright © 2009 Mayo Foundation for Medical Education and Research Terms and Conditions

FIGURE 3 Coronary angiograms of left and right coronary arteries. A and B, Normal left main coronary artery, left anterior descending artery, and left circumflex artery and their respective branches. C, Normal right coronary artery and its respective branches. D, Hemodynamic tracings of aortic (Ao) pressure and right ventricular (RV) pressure, showing right-sided systolic pressures to be one-half of systemic pressures; Ao pressure, pulmonary artery occlusive pressure (PAOP), and right atrial (RA) pressure, showing severely elevated left-sided pressures (mean, 30 mm Hg) and moderately elevated right-sided filling pressures (mean right atrial pressure, 15 mm Hg). Pulmonary arteriolar resistance ([mean pulmonary artery pressure — pulmonary artery occlusive pressure]/cardiac output) was normal at 1.47 Wood unit, suggesting that the elevated right-sided systolic pressures were secondary to left ventricular dysfunction and not intrinsic pulmonary disease. Cardiac output calculated with the Fick formula (cardiac output = stroke volume × heart rate) was normal at 5.2 L/min due to a heart rate of 135 beats/min; however, stroke volume was severely decreased at 39 mL. Mayo Clinic Proceedings 2009 84, 1001-1009DOI: (10.4065/84.11.1001) Copyright © 2009 Mayo Foundation for Medical Education and Research Terms and Conditions

FIGURE 4 Endomyocardial biopsy specimens. Left, Low-power view showing diffuse lymphocytic infiltration of myocardium (arrow). Right, High-power view showing lymphocytic infiltration with myocyte destruction and surrounding myocardial edema (circle). Mayo Clinic Proceedings 2009 84, 1001-1009DOI: (10.4065/84.11.1001) Copyright © 2009 Mayo Foundation for Medical Education and Research Terms and Conditions

FIGURE 5 Evolution of viral causes of myocarditis over time. CVA = coxsackievirus A; CVB = coxsackievirus B; EBV = Epstein-Barr virus; HCV = hepatitis C virus; HHV6 = human herpesvirus 6; PV-B19 = parvovirus B19. Mayo Clinic Proceedings 2009 84, 1001-1009DOI: (10.4065/84.11.1001) Copyright © 2009 Mayo Foundation for Medical Education and Research Terms and Conditions