Heart failure can occur if the guts cannot pump (systolic) or fill (diastolic) adequately. Symptoms include shortness of breath, fatigue, swollen legs, and rapid heartbeat. Treatments can include eating less salt, limiting fluid intake, and taking prescription medication. In some cases, a defibrillator or pacemaker may be implanted. Heart failure may be a chronic long-term condition that gets worse with time. There are four stages of coronary failure (Stage A, B, C, and D). The stages range from "high risk of developing coronary failure to "advanced heart failure," and supply treatment plans.  Cardiac regeneration may be a broad effort that aims to repair irreversibly damaged heart tissue with cutting-edge science, including somatic cell and cell-free therapy.