Complex sentence: In 82% of epilepsy patients the heart rate increases quickly and suddenly upon a seizure This so-called ictal or peri-ictal tachycardia is so characteristic that it can be distinguished from the slow gradual increase of heart rate that occurs during physical activity.
Split into simpler sentences: In 82% of epilepsy patients the heart rate increases quickly and suddenly upon a seizure This is known as ictal tachycardia. Ictal tachycardia is so characteristic that it can be distinguished from the slow gradual increase of heart rate that occurs during physical activity.