small monitoring device - approximately the size of a USB stick - that is implanted under the skin and used to diagnose arrhythmias by recording the cardiac events associated with them, jälgimismõõtevahend, umbes USB-pulga suurune, mis implanteeritakse naha alla ja mida kasutatakse arütmiate diagnoosimiseks, mõõtes ja salvestades nendega seotud südamesündmused, small device that is implanted under the skin of the chest for cardiac monitoring, to record the heart's electrical activity for an extended period