Greek also had an alpha copulativum, a- or ha-, expressing union or likeness, which is the a- expressing "together" in acolyte, acoustic, Adelphi, etc. It is from PIE root *sem- (1) "one; as one, together with."
"periodic contraction of the heart and arteries," 1570s, from Greek systole "a drawing together, contraction," from syn- "together" (see syn-) + stem related to stellein "to bring together, draw in; to put, set, place," from PIE *stel-yo-, suffixed form of root *stel- "to put, stand, put in order," with derivatives referring to a standing object or place.
<a href="https://www.etymonline.com/word/asystole">Etymology of asystole by etymonline</a>
Harper, D. (n.d.). Etymology of asystole. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/asystole
D. Harper. “Etymology of asystole.” Online Etymology Dictionary. https://www.etymonline.com/word/asystole (accessed $(datetime)).
Definitions of asystole
absence of systole; failure of the ventricles of the heart to contract (usually caused by ventricular fibrillation) with consequent absence of the heart beat leading to oxygen lack and eventually to death;