The first number is called systolic blood pressure because it indicates blood pressure during the heartbeat (systole), and the second number is called diastolic blood pressure because it indicates blood pressure while the heart is relaxed (diastole).
Numri i parë quhet tension sistolik i gjakut, sepse tregon tensionin e gjakut gjatë tkurrjes së zemrës (sistolës). Numri i dytë quhet tension diastolik i gjakut, pasi tregon tensionin e gjakut kur zemra lëshohet (diastolë).