heart and cardiac pacemaker on white background 3d render, heart anatomy, section, right and left ventricle, atria, valves

abnormal anatomy and aorta arrhythmia artificial atria attack beat cardiac cardiogram care correct defibrillator device diagnosis diagnostic ecg equipment failure health healthy heart heartbeat heartbeats illustration implant implantable irregular isolated left maker medical medicine organ pace pacemaker pacemakers pulse rate render rhythm right risk surgery tachycardia transplant valve vein work