Clark County Health Department

Clark County Health Department provides various screenings and testings for the residents of Clark County.A blood pressure reading has two numbers. The top number is the pressure when your heart pumps blood. It is called Systolic Pressure. The bottom number is the pressure between pumps. It is called Diastolic Pressure. Your blood pressure is considered high if: The top number is 140 or more, and/or the bottom number is 90 or more.