Drop/Add and Withdrawal Deadlines. Registration deadlines determine the last day you are able to add, drop or withdraw from classes. Each class has its own set of registration deadlines which are based on the length of the class as well as the session in which the class is held.
cardiac pacemaker - a specialized bit of heart tissue that controls the heartbeat. SA node, sinoatrial node, pacemaker. cardiac muscle, heart muscle - the muscle tissue of the heart; adapted to continued rhythmic contraction.
Description of the procedure. A pacemaker is a small battery-powered electronic device that is surgically implanted, usually in your chest, to monitor and regulate abnormal heart rate and rhythm (arrhythmia). A pacemaker consists of a pulse generator and leads. The generator produces electrical signals and the leads (insulated wires) transmit the signals to the heart.