The study found that 24 percent of the patients had been misdiagnosed: 22 patients previously diagnosed with epilepsy were found to have nonepileptic seizures, and four patients previously diagnosed with nonepileptic seizures were found to have epileptic seizures.
The purpose of valves is to prevent back flow of blood. In other words, it ensures that blood flows only in one direction . An atrioventricular (AV) valve is a valve located in the heart between the atria and the ventricles. In the right side of the heart, the AV valve is called the tricuspid valve . On the left side of the heart, the AV valve is called the mitral valve .
The SL valves function to stop blood from flowing back into the ventricles during the 2nd heart sound. So the first beat you hear are the AV vales closing shut (they shut rapidly and hard so this sound is louder) then the second beat are the SL valves slowly(relatively so) closing shut, producing a quieter sound. Source(s): My Flying Toast OWNS Yours! Â· 4 years ago.