James H. O'Keefe, MD, Harshal R. Patil, MD, Carl J

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Presentation transcript:

Potential Adverse Cardiovascular Effects From Excessive Endurance Exercise James H. O'Keefe, MD, Harshal R. Patil, MD, Carl J. Lavie, MD, Anthony Magalski, MD, Robert A. Vogel, MD, Peter A. McCullough, MD, MPH Mayo Clinic Proceedings Volume 87, Issue 6, Pages 587-595 (June 2012) DOI: 10.1016/j.mayocp.2012.04.005 Copyright © 2012 Mayo Foundation for Medical Education and Research Terms and Conditions

FIGURE 1 Relationship between dose of physical activity and reduction in all-cause mortality. The mortality benefits of exercise appear with even small amounts of daily exercise and peak at 50 to 60 minutes of vigorous exercise per day. From Lancet,5 with permission. Mayo Clinic Proceedings 2012 87, 587-595DOI: (10.1016/j.mayocp.2012.04.005) Copyright © 2012 Mayo Foundation for Medical Education and Research Terms and Conditions

FIGURE 2 A, Picrosirius-stained photomicrographs of RV sections. By 16 weeks, the RVs of exercising rats show widespread interstitial collagen deposition with disarray of myocardial architecture (arrows). B, Mean ± standard error of the mean collagen content in RV FW, IVS, and LV FW. *P<.05 (exercising vs sedentary rats). FW = free wall; IVS = interventricular septum; LV = left ventricle; RV = right ventricle. From Circulation,24 with permission. Mayo Clinic Proceedings 2012 87, 587-595DOI: (10.1016/j.mayocp.2012.04.005) Copyright © 2012 Mayo Foundation for Medical Education and Research Terms and Conditions

FIGURE 3 High-sensitivity cardiac troponin T (hs-cTnT) concentrations before, immediately after, and 24 and 72 hours after marathon race. From Med Sci Sports Exerc,40 with permission. Mayo Clinic Proceedings 2012 87, 587-595DOI: (10.1016/j.mayocp.2012.04.005) Copyright © 2012 Mayo Foundation for Medical Education and Research Terms and Conditions

FIGURE 4 Duration-dependent effect of endurance events on right ventricular (RV) ejection fraction. From Eur Heart J,45 with permission. Mayo Clinic Proceedings 2012 87, 587-595DOI: (10.1016/j.mayocp.2012.04.005) Copyright © 2012 Mayo Foundation for Medical Education and Research Terms and Conditions

FIGURE 5 Differential effect of prolonged intense exercise on right and left ventricular volumes. Baseline volumes are shown on the left, and the changes in volume post-race are shown on the right. Right ventricular volumes increased in the post-race setting, whereas left ventricular volumes decreased, resulting in a decrease in right ventricular ejection fraction but not left ventricular ejection fraction. From Eur Heart J,45 with permission. Mayo Clinic Proceedings 2012 87, 587-595DOI: (10.1016/j.mayocp.2012.04.005) Copyright © 2012 Mayo Foundation for Medical Education and Research Terms and Conditions

FIGURE 6 Delayed gadolinium enhancement in 5 athletes. Images of 5 athletes in whom focal delayed gadolinium enhancement was identified in the interventricular septum (arrows), compared with a normal study in an athlete (top left). From Eur Heart J,45 with permission. Mayo Clinic Proceedings 2012 87, 587-595DOI: (10.1016/j.mayocp.2012.04.005) Copyright © 2012 Mayo Foundation for Medical Education and Research Terms and Conditions

FIGURE 7 Proposed pathogenesis of cardiomyopathy in endurance athletes. BNP = B-type natriuretic peptide; CK-MB = creatine kinase MB; LV = left ventricle; RA = right atrium; RV = right ventricle; SCD = sudden cardiac death. Mayo Clinic Proceedings 2012 87, 587-595DOI: (10.1016/j.mayocp.2012.04.005) Copyright © 2012 Mayo Foundation for Medical Education and Research Terms and Conditions