is ventricular depolarisation same as depolarisation during nerve impulse conduction? Does the change in membrane charge accumulation occur in a similar way in heart and nerves cells?

Depolarisation of nerve (here Purkinje fibres) causes Action Potential (bcoz of opening of voltage gated Na channels) which causes opening of Ca++ channels in membrane of heart muscle- results in ventricular contraction

So ventricular depolarisation is actually action potential in heart muscle of ventricles

So both terms are related Ventricular depolarisation is a consequence of nerve impulse(depolarisation of nerve here Purkinje fibres )

Thnks Ps: read bracket portion separately