When the cardiac rhythm is ventricular fibrillation the muscle cells are still contracting but there is?

When the cardiac rhythm is ventricular fibrillation, the muscle cells are contracting in a chaotic and uncoordinated manner, leading to ineffective pumping of blood. This results in the heart being unable to maintain a proper rhythm, causing a critical loss of blood flow to vital organs. Consequently, it can lead to cardiac arrest if not treated promptly.