A "normal heartbeat" refers to the regular rhythm of the heart when it is functioning properly. It means that the heart is beating at a steady pace and is able to pump blood effectively throughout the body. Full definition
The inclusion of potassium is necessary for maintaining electrolyte balance for normal heartbeat and blood pressure levels. (vetapprovedrx.pharmacy)
Currently, his lab is trying to work out how the molecule restores the inner workings of cells to restore normal heartbeat patterns. (sciencenewsforstudents.org)
Normal heartbeats start in the right atrium, but in sick hearts, the heartbeats can start from any chamber. (tampabayvets.net)