Louie G’s Tuesday Morning Trivia Question!

I was thinking that if you took every week's 'Tuesday Morning Trivia Question' and put it into a book form you could release a trivia book and make a ton of money!  My fee would only be pizza for life!  :)

Of course, if that happens then my blood pressure might be off the charts.  Speaking of blood pressure, here is today's 'Tuesday Morning Trivia Question':

In a blood pressure reading, what is the top number referred to as?

Answer:  Systolic