<s>[INST] What do the numbers mean? [/INST] A common blood pressure might be 120/80 (said as ‘120 over 80’). These values are quoted in units known as millimetres of mercury (mmHg). There are 2 numbers because the blood pressure varies with the heartbeat. The higher pressure (120) represents the pressure in the arteries when the heart beats, pumping blood into the arteries. This pressure is called systolic pressure. The lower pressure (80) represents the pressure in the arteries when the heart is relaxed between beats. This pressure is called diastolic pressure. Source: International Society of Hypertension. Link: https://ish-world.com/faq/. Field: Cardiovascular. Disease: Hypertension </s>