Blood pressure is governed by five elements--the strength of the heartbeat, the volume of blood, the viscosity of the blood, the resistance of the arterioles, and the elasticity of the arterial walls. An abnormality of any of these can cause the blood pressure to be too high or too low.
Depending on the complexity of the case a trial can last anywhere from one day to six months or longer. If you are asking how long a rape prosecution takes you are probably looking at 6 months to a couple of years.
Length of Service. Most jury trials last 3 - 7 days, but some may go longer. The Superior Court uses the One Day/One Trial program under California Rules of Court, rule 2.1002, which is intended to make jury service more convenient by shortening the time that a person is required to serve to one day or one trial.