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Answers from Sheldon G. Sheps, M.D. Yes. If you have a diastolic number â the bottom number of a blood pressure measurement â less than 90 millimeters of mercury (mm Hg) and a systolic number â the top number of a blood pressure measurement â greater than 140 mm Hg, you have a common type of high blood pressure called isolated systolic hypertension.
When blood pressure is measured, we commonly record the pressure as two numbers, one above the other - like a fraction. The top number is the systolic blood pressure. This is the pressure in the artery during the beating of the heart (systole). This is the pressure that creates the pulse we feel in the wrist or neck. The bottom number is the diastolic blood pressure.