Heart failure is the pathological process in which the systolic or/and diastolic function of the heart is impaired, and as a result, cardiac output decreases and is &v2 unable to meet the metabolic demands of e bodHeart failure is the pathological process in which the systolic or/and diastolic function of the heart is impaired, and as a result, cardiac output decreases and is unable to meet the metabolic demands of the body