If someone has high diastolic blood pressure, it does not necessarily mean that they have high systolic blood pressure, notes the Mayo Clinic. It is possible to have isolated high diastolic or isolated high systolic blood pressure.
Systolic blood pressure is the result of the heart beating and applying a force against the arteries, explains WebMD. A normal systolic blood pressure is under 120 millimeters of mercury, which is typically referred to as 120 mm Hg. Diastolic blood pressure is the result of the force of blood on the arteries while the heart is at rest, in between beats. A normal diastolic blood pressure is under 80 millimeters of mercury. Anything higher than these measurements is considered pre-hypertension or hypertension, or high blood pressure. Consistent high blood pressure can cause significant health problems, such as a heart attack, stroke, kidney problems, headaches or chronic heart or kidney diseases.