1
small
square
is
equal
to
____________________
.
____________________
seconds
1
Large
square
is
equal
to
____________________
.
____________________
seconds
5
Large
squares
is
equal
to
____________________
.
____________________
seconds
QRS
complex
range
is
____________________
.
____________________
to
____________________
.
____________________
seconds
PR
interval
range
is
____________________
.
____________________
to
____________________
.
____________________
seconds
QT
interval
range
is
____________________
.
____________________
to
____________________
.
____________________
second
s