User`s guide

Understanding the PageWriter 300pi Predictive Instrument Applications
PageWriter 200/300pi M1771A/1770A Cardiograph 3-21
3
Rhythm Grouping of Beats
The Rhythm Grouping of Beats is a number string which relates spatially to
the beats in the ECG and shows the rhythm group number for each beat as
determined by the Rhythm Analysis portion of the Analysis Program.
Possible values are:
1,2,3,4, or 5 Rhythm group number
0 Beat unclassifiable by program
— — Lead switching interval
NO MEAS Program unable to measure any beats in the
lead set.
Understanding the PageWriter 300pi Predictive
Instrument Applications
The ACI TIPI (Acute Cardiac Ischemia- Time Insensitive Predictive Instru-
ment) and the TPI (Thrombolytic Predictive Instrument) are software prod-
ucts that enhance the computer-assisted ECG analysis capabilities of the
PageWriter 300pi Cardiograph. These "Predictive Instruments" generate 0-
100% Predicted Probability scores of ACI (Acute Cardiac Ischemia) and
patient outcome with and without thrombolytic therapy for acute myocardial
infarction (AMI). These predicted probabilities are based on ECG features,
Trigeminy String N/A Total number of beats in the longest continuous
trigeminy pattern.
Wenckebach Count N/A Total number of Wenckebach cycles.
A Wenckebach cycle is a series of beats whose
PR intervals grow progressively longer, culmi-
nating in an unusually long RR interval, (a
dropped beat).
Wenckebach String N/A The number of beats preceding the dropped
beat.
Parameter Units or Value Description