Blood pressure (BP) is the pressure of circulating blood on the walls of blood vessels. Blood pressure usually refers to the pressure in large arteries of the systemic circulation. It is usually expressed in terms of the systolic pressure (maximum during one heartbeat) over diastolic pressure (minimum in between two heartbeats) and is measured in millimeters of mercury (mmHg), above the surrounding atmospheric pressure. Blood pressure is one of the vital signs, along with the respiratory rate, heart rate, oxygen saturation, and body temperature to measure the healthiness of the human body. Normal resting blood pressure in an adult is approximately 120/80 mmHg. For regular health and heart checkups, schedule a visit with us.