Which condition is characterized by the heart's inability to pump blood sufficiently to meet the body's needs?

Congestive Heart Failure (CHF) is defined as a clinical syndrome in which the heart is unable to pump blood effectively to meet the metabolic demands of the body's tissues. This condition can result from a variety of issues, including structural heart problems, weakened heart muscle, or overloading the heart with fluid, but the key characteristic is the heart's diminished ability to circulate blood efficiently. This leads to symptoms such as fatigue, shortness of breath, and fluid retention, which are hallmarks of the condition as the body struggles to compensate for reduced cardiac output.