The lowest is the Diastolic Blood Pressure. The highest pressure in the cycle is called the Systolic Blood Pressure. 118/78 mmHg, which is Systolic/Diastolic or SYS/DIA). The blood pressure readings have two numbers (e. What is blood pressure and what do the readings mean?īlood pressure is a measure of the force of blood flowing against the walls of the arteries. Back Blood Pressure Diary and Blood Pressure Pass (free download) for tracking your measurements
