Approximately a million pacemakers are annually implanted in patients to provide electrical stimulation to regulate heartbeat. Conventional pacemakers are surgically placed under the skin of patient's chest stretching from the shoulder vein and attaching to the heart. The wires and surgery lead to complications in the patient. Leadless pacemakers on the other hand are devoid of wires and are ten times smaller than the traditional pacemakers.They are placed directly into the heart using a catheter passed through the femoral vein in the leg. A study compared short- and mid-term complications between 718 patients receiving the Nanostim leadless pacemaker and 1436
