Brain atrophy is shrinking of the brain caused by the loss of its cells, called neurons.Two types of brain atrophy can occur; generalized and focal. Generalized atrophy refers to neuron loss throughout the entire brain, and focal atrophy refers to neuron loss in a specific brain region.rain atrophy is shrinking of the brain caused by the loss of its cells, called neurons.
A cardiac arrest occurs when your heart suddenly stops beating. The heart functions through electrical pulses, and when those pulses are interrupted it can cause an irregular heartbeat or cardiac arrest. The cause of cardiac arrest is an electrical problem. It does not have anything to do with your arteriesâ functions. cardiac arrest occurs when your heart suddenly stops beating. The heart functions through electrical pulses, and when those pulses are interrupted it can cause an irregular heartbeat or cardiac arrest. The cause of cardiac arrest is an electrical problem. It does not have anything to do with your arteriesâ functions.
One cause of sudden cardiac arrest is a heart attack. Sometimes, people who are having heart attack have a complication of sudden cardiac death if they don't get to the hospital soon enough, Goldberg said. Yet most heart attacks do not lead to sudden arrest, according to the American Heart Association.