Heart failure

inability of the heart to function properly

Congestive heart failure (CHF), also called congestive cardiac failure (CCF) or just heart failure, is a condition that can result from any structural or functional cardiac disorder that impairs the ability of the heart to fill with or pump a sufficient amount of blood through the body. It is not to be confused with "cessation of heartbeat", which is known as asystole, or with cardiac arrest, which is the cessation of normal cardiac function with subsequent hemodynamic collapse leading to death. Because not all patients have volume overload at the time of initial or subsequent evaluation, the term "heart failure" is preferred over the older term "congestive heart failure".
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Heart failure is a condition in which the heart has lost the ability to pump enough blood to the body's tissues. [more]Heart failure - Community and Resources

Noun
1. inability of the heart to pump enough blood to sustain normal bodily functions
(synonym) coronary failure
(hypernym) heart disease, heart condition, cardiopathy
(hyponym) congestive heart failure

Inability of the heart to keep up with the demands on it and pump the blood with normal efficiency.