Question: A systolic bp value is the pressure when?
Disambiguated questions and answers: question: A systolic bp value is the pressure when the blood pressur is at?
A systolic bp value is the pressure when during the cardiac cycle?
answer: maximum during one heartbeat
end of the cardiac cycle when the ventricles are contracting
eak pressure in the arteries
Natural Questions answer: the ventricles are contracting (from the Wikipedia article "Blood pressure")