Which condition is NOT primarily characterized by failure of the heart to pump adequate blood?

Pulmonary edema is primarily characterized by fluid accumulation in the lungs, which can occur as a result of various underlying conditions, including heart issues, but it is not itself a condition that is directly defined by the heart's inability to pump adequate blood. While heart failure and ventricular fibrillation are directly related to the heart's pumping ability, and cor pulmonale refers to right heart failure secondary to lung issues, pulmonary edema is more a consequence of other heart-related problems rather than a standalone condition characterized by pump failure. It may indeed occur due to heart failure; however, it can also result from other factors like infections or fluid overload, highlighting that it doesn’t primarily stem from the heart’s pumping efficacy.