Estimates of the coexistence of epilepsy and psychogenic nonepileptic seizures vary from 5 percent to more than 60 percent, depending on the study setting and diagnostic criteria.3 Recent studies17, 22 using strict criteria for a diagnosis of epilepsy found that only 5 to 10 percent of patients with non-epileptic seizures have concurrent epileptic seizures.
the contraction, or period of contraction, of the heart, especially of the ventricles, during which blood is forced into the aorta and pulmonary artery. atrial systole. contraction of the atria by which blood is forced into the ventricles; it precedes the true or ventricular systole. extra systole. see extrasystole.
The pressure and volume events of the cardiac cycle can be divided into five steps: Atrial systole - the contraction force of the atria completes the emptying of blood (25milliliters) out of the atria into the ventricles (105 milliliters) AV valves are open during atrial systole, the ventricle are relaxed (diastole) and filling with blood (130 milliliters), this blood volume is called the end-diastolic volume or EDV.