An implantable cardioverter-defibrillator (ICD) or automated implantable cardioverter defibrillator (AICD) is a device implantable inside the body, able to perform defibrillation, and depending on the type, cardioversion and pacing of the heart

A pacemaker is a small, battery-powered medical device implanted under the skin, usually near the collarbone

A heart valve (cardiac valve) is a biological one-way valve that allows blood to flow in one direction through the chambers of the heart

A coronary stent is a tube-shaped device placed in the coronary arteries that supply blood to the heart to keep the arteries open in patients suffering from coronary heart disease