This can happen because of ischemia (lack of blood flow) caused by blockage (thrombosis, arterial embolism), or a haemorrhage (leakage of blood).
Hal iko dapek tajadi dek iskemia (bakurangnyo aliran darah) nan disababkan juo dek panyumbekan (thrombosis, arterial embolism), atau adonyo padarahan (haemorrhage).[12]