A device used to observe and check the rate, rhythm, or some other aspect of the heart.
 the head coach instituted players wearing heart monitors at practice
 Example sentencesExamples
-  Software programs are available that can transform PDAs into calorie counters, fitness trainers, and even portable heart monitors.
 -  A new video enhancement tool and a non-invasive heart monitor are just a couple of the agency's nearly 50 commercialized products featured.
 -  Club members have stepped in to help to boost the fundraising total to buy heart monitors.
 -  The appeal quickly paid for 12 new portable heart monitors for use at York Hospital.
 -  The money will be used by the hospital to buy two new heart monitors.
 -  The killer turns out to be the technician who services the patient's heart monitor.
 -  We have put people on heart monitors to test how excited they get.
 -  She has become bradycardic, requiring a heart monitor at night.
 -  The child, who is now 14 months old, gave up his heart monitor for good only a month ago.
 -  She said a heart monitor had revealed that his heart was stopping during the night for up to three seconds.