In the U.S. in 2014 less than 5 girls were given the name. Less than 5 boys were given the name. View the Monna Name Popularity Page to see how the popularity trend for Monna has changed since 1880, or to compare the popularity of Monna to other names. Monna is a variant spelling of Mona.n the U.S. in 2014 less than 5 girls were given the name. Less than 5 boys were given the name. View the Monna Name Popularity Page to see how the popularity trend for Monna has changed since 1880, or to compare the popularity of Monna to other names. Monna is a variant spelling of Mona.
1 2. 2. 2  The average duration of the QRS complex in 100 normal adults was 0.0777 second. 3  Fifty of the patients were males with an average duration of the QRS time interval of 0.0833 second, and 50 were females with a shorter time interval of 0.0722 second.
The P-R Interval. The first measurement is known as the P-R interval and is measured from the beginning of the upslope of the P wave to the beginning of the QRS wave. This measurement should be 0.12-0.20 seconds, or 3-5 small squares in duration.The second measurement is the width of the QRS which should be less than 3 small squares, or less than 0.12 seconds in duration. Image: Normal Intervals. 1  P-R interval = 0.12 - 0.20 sec (3 - 5 small squares).2  QRS width = 0.08 - 0.12 sec (2 - 3 small squares). 3  Q-T interval 0.35 - 0.43 sec. P-R interval = 0.12 - 0.20 sec (3 - 5 small squares). 2  QRS width = 0.08 - 0.12 sec (2 - 3 small squares). 3  Q-T interval 0.35 - 0.43 sec. * 4  The PR interval should really be referred to as the PQ interval; however it is commonly referred as the PR interval.