Blood pressure: why both numbers matter
The two numbers describe different parts of the heartbeat. Their meaning depends on the person and the pattern over time.
Three things to know
The video explains systolic pressure, the top number, as pressure when the heart contracts. It relates rising systolic pressure to reduced elasticity in the arteries.
Diastolic pressure, the bottom number, describes pressure between beats. The video explains the role of resistance in smaller vessels and why a raised lower number should not be dismissed.
Age and overall health affect interpretation. The source advises correct, repeated measurements and discussion of persistent abnormalities with a qualified clinician; one reading is not a diagnosis.