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.
Scheduling a Trial Date and Trial Call. Criminal trials are normally set approximately 90 days from the date of arraignment. If the defendant is in custody, the case will be set within 60 days from the date of arrest (unless the defendant files a motion to waive the 60-day rule). Domestic relations cases are set within six months from the date the petition or show cause was filed.