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.
Atrioventricular Valves Function. Av Valves Function. There are four valves, pulmonary, mitrial,tricuspid and aortic in the heart. There is an AV(atrioventricular) node within the heart. When the heart is in diastole, at rest 1/10th second, an electrical impulse begins to emanate from the sinoatrial node. Atrial systole is bought about by the impulse for the sinoatrial node spreading over the artia.