An illustration of a normal heart and a heart with dilated cardiomyopathy. When contractility is compromised, the ventricular heart can become dilated. This can lead to heart failure. Image from Blausen.com staff (2014). “Medical gallery of Blausen Medical 2014”. WikiJournal of Medicine 1 (2). DOI:10.15347/wjm/2014.010. ISSN 2002-4436. (Own work) [CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons