http://articles.mercola.com/sites/articles/archive/2003/03/05/vitamin-d-part-fourteen.aspxA lack of vitamin D may contribute to congestive heart failure, as researchers found that patients with chronic heart failure have lower levels of the vitamin in the blood. Congestive heart failure occurs when the heart fails to pump blood around theenCommunityServer 2008.5 SP1 (Build: 31106.3070)