these patients results in reduced heart rates and im- proved cardiovascular efficiency during usual daily activities. This is only the second report providing a system- atic evaluation of the effects of programmed training on aerobic capacity after the Fontan operation. Mi- namisawa et al 20 reported on a 2- to 3-month exercise training program (walking or jogging) held 2 or 3 times a week for 20 to 30 minutes in 19 teens and young adults after the Fontan operation. The exercise training in these patients resulted in an increase in maximal oxygen consumption (7%) and exercise time (4%). They also observed that heart rate tended to decrease during small workloads after training and oxygen pulse tended to increase. Our findings are similar but of greater magnitude, probably because the training period was longer. Further, we found definite improvement in cardiovascular efficiency at small workloads. 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Hemodynamic and metabolic effects. Circu- lation 1988;78:506 –515. 14. Sullivian MJ, Higginbotham MB, Cobb FR. Exercise training in patients with chronic heart failure delays ventilatory anaerobic threshold and improves sub- maximal exercise performance. Circulation 1989;79:324 –329. 15. Coats ATS, Adamopolulos S, Meyer TE, Conway J, Sleight P. Effects of physical training in chronic heart failure. Lancet 1990;335:63– 66. 16. Coats AJ. Exercise and heart failure. Cardiol Clin 2001;19:517–524. 17. Belardinelli R, Georgiou D, Cianci G, Purcaro A. Randomized, controlled trial of long-term moderate exercise training in chronic heart failure, effects on functional capacity, quality of life and clinical outcome. Circulation 1999;99: 1173–1182. 18. Belardinelli R, Georgiou D, Scocco V, Barstow TJ, Purcaro A. Low intensity exercise training in patients with chronic heart failure. J Am Coll Cardiol 1995;26:975–982. 19. Durongpisitkul K, Driscoll DJ, Mahoney DW, Wollan PC, Mottran CD, Puga FJ, Danielson GK. Cardiorespiratory response to exercise after modified Fontan operation: determinants of performance. J Am Coll Cardiol 1997;29: 785–790. 20. Minamisawa S, Nakazawa M, Momma K, Imai Y, Satomi G. Effect of aerobic training on exercise performance in patients after the Fontan operation. Am J Cardiol 2001;88:695– 698. Values of High-Sensitivity C-Reactive Protein in Each Month of the Year in Apparently Healthy Individuals Ori Rogowski, MD, Sharon Toker, MSc, Itzhak Shapira, MD, Samuel Melamed, PhD, Arie Shirom, PhD, David Zeltser, MD, MPH, and Shlomo Berliner, MD, PhD The serum levels of high-sensitivity C-reactive protein were determined during a 12-month period. No sea- sonal variation was found in a group of 1,677 ap- parently healthy patients in whom the presence of clinically evident infection or inflammation was ex- cluded by an appropriate questionnaire. 2005 by Excerpta Medica Inc. (Am J Cardiol 2005;95:152–155) I t has been repeatedly shown that high-sensitivity C- reactive protein (hs-CRP) is a useful marker for the presence of low-grade inflammation in apparently healthy patients. 1 The determination of hs-CRP in these patients has been shown to have significant prognostic implications in terms of future cardiovascular events. 2 In this regard, it is important to determine whether the concentration of this protein changes during the winter season, when respiratory tract infections are more prevalent and could have an influence on the results of hs-CRP. From the Department of Medicine “D” and Institute for Special Medical Examinations (MALRAM), Tel Aviv Sourasky Medical Center, Tel Aviv; and the National Institute of Occupational & Environmental Health, Raanana, Israel. Dr. Berliner’s address is: Department of Internal Medicine “D,” Tel-Aviv Sourasky Medical Center, 6 Weizman Street, Tel Aviv 64239, Israel. E-mail: shapiraiz@tasmc.health.gov.il. Manu- script received April 14, 2004; revised manuscript received and accepted August 16, 2004. 152 ©2005 by Excerpta Medica Inc. All rights reserved. 0002-9149/05/$–see front matter The American Journal of Cardiology Vol. 95 January 1, 2005 doi:10.1016/j.amjcard.2004.08.086