Irregular heartbeat; any change from the normal rate or rhythm of the heart, such as beating too fast, too slow, or unevenly.

An irregular or abnormal heart rhythm; includes heart rates that are too fast, too slow, or uneven. Also called [[心律失常|心律失常|xin1 lu:4 shi1 chang2]] or [[心律不整|心律不整|xin1 lu:4 bu4 zheng3]].

irregular heartbeat; medical condition where the heart beats too fast, too slow, or with an uneven rhythm