Uncoordinated

Tom was a gangly, uncoordinated child who grew into a clumsy adult.

Tom was lanky and a bit uncoordinated as a child, but he was fairly good at basketball.

Atrial fibrillation is a major cause of stroke and heart failure and may also be related to an increased risk of death. It's an abnormal rhythm of the heart that is caused when the upper chambers of the heart beat in an uncoordinated and irregular fashion.

Though occasionally a “flatliner” can be revived with a defib, it is most commonly used to change the uncoordinated contractions of the heart (fibrillation) into a normal sinus rhythm—that is, to defibrillate the heart.