The name isovolumetric indicates that there is no change in volume that takes place and this only occurs when all of the valves within the heart are shut.
Isovolumentric contraction phase of the cardiac cycle is the stage at which isovolumentric contraction occurs, at this phase all of the four valves of the heart are closed.
It releases nutrients which causes rapid growth of planktons which leads to oxygen deficiency leading to death of aquatic animals,a phenomenon known as eutrophication.
