Comment on

• Usefulness of mitral annular velocity in predicting exercise tolerance in patients with impaired left ventricular systolic function.

  Hadano Y, Murata K, Yamamoto T, Kunichika H, Matsumoto T, Akagawa E, Sato T, Tanaka T, Nose Y, Tanaka N, Matsuzaki M. Hadano Y, et al. Am J Cardiol. 2006 Apr 1;97(7):1025-8. doi: 10.1016/j.amjcard.2005.10.044. Epub 2006 Feb 17. Am J Cardiol. 2006. PMID: 16563909
• Resting left ventricular function, however measured, is poorly related to exercise capacity in chronic heart failure.

  Witte KK, Clark AL. Witte KK, et al. Am J Cardiol. 2006 Sep 1;98(5):709-10. doi: 10.1016/j.amjcard.2006.05.002. Epub 2006 Jul 5. Am J Cardiol. 2006. PMID: 16923470 No abstract available.