How does an electronic blood pressure monitor work? Blood pressure refers to the pressure that blood exerts on the walls of blood vessels as it flows through the blood vessels. In a cardiac cycle, there are corresponding "systolic blood pressure" (commonly known as "high pressure") and "diastolic blood pressure" (commonly known as "low pressure"). Electronic bp machine use electronic pressure and pulsation sensors to identify pressure and pulsation signals, and express them in digital form to display systolic blood pressure, diastolic blood pressure and pulse rate. Its advantages are simple operation, intuitive reading, and automatic measurement at the touch of a button, suitable for home use.