what does the bottom number mean in bp
Let me explain in general terms what the blood pressure numbers mean: top number (the systolic blood pressure) is the pressure the heart has to overcome to open the valves to pump blood out. Bottom number (the diastolic blood pressure) is the pressure between beats when the heart is resting.
Your blood pressure consists of two numbers: The top or higher number is called the systolic number (pressure in vessels when your heart is beating), and the bottom or lower number is your diastolic number (pressure in your vessels when your heart is at rest).