The main feature of coronary care is the availability of telemetry or the continuous monitoring of the cardiac rhythm by electrocardiography.
One definition of a hook is a musical or lyrical phrase that stands out and is easily remembered. Definitions typically include some of the following: that a hook is repetitive, attention-grabbing, memorable, easy to dance to, and has commercial potential and lyrics. A hook has been defined as a part of a song, sometimes the title or key lyric line, that keeps recurring.
hook - catch with a hook; hook a fish seize - hook by a pull on the line; strike a fish grab, take hold of, catch - take hold of so as to seize or restrain or stop the motion of; Catch the ball!; Grab the elevator door!