I need to find out if the E350i interpretation algorithm calculation of PR interval uses a mean or a median. The Operators Manual does not say. A seasoned Burdick tech told me this information would be in the "Physician Guide" that came with the machine when new. I have not been able to locate one. Please let me know if you can tell me mean or median or have access to a "Physician Guide". Thank you
Thu Feb 02 2012
Burdick E350i calculation of PR interval
Mon Feb 06 2012Reply from rdttech

As stated in the “physician’s guide”:
PR Interval
Omit this section if:
- The P wave flage (from rhythm analysis) is not set.
- The rhythm is not NOT SINUS RHYTHM
- WPW syndrome is present
STATEMENT
- Short PR: Possible Ventricular
Preexcitation
- The PR interval is less than the lower limit for age as specified in the table.
Age range : lower limit
In years : in seconds
0-2 : 0.07
3-11 : 0.9
12 + : 0.10
-
SHORT PR INTERVAL
- 0.10s < PR interval <0.11s
And (b) age >_ 12
-
FIRST DEGREE A-V BLOCK
- PR interval >_ 0.22s
-
BORDERLINE FIRST DEGREE A-V BLOCK
- 0.20s <_ PR INTERVAL <0.22s
NOTE: The statements 3 and 4 are determined by the rhythm analysis.
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