Data Critical Corporation 02DT-7000 User Manual
TROUBLESHOOTING
PatientNet Operator’s Manual, v1.04, 10001001-00X, Draft
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Example 11 - Possible Problems Related to Tall P and T-Waves
Problem
The algorithm is designed to selectively recognize the P and T waves and to empha-
size detection of the R-wave, so as to prevent classifying the former as Beats.
size detection of the R-wave, so as to prevent classifying the former as Beats.
1. Large P-waves may be detected and classified incorrectly as R-waves, caus-
ing the algorithm to generate incorrect high heart rate, or PVC related, false
alarms. For example, you manually count 70 BPM, but the computer counts
140 BPM. The system is double counting due to the size of the P-wave in rela-
tion to the R-wave.
alarms. For example, you manually count 70 BPM, but the computer counts
140 BPM. The system is double counting due to the size of the P-wave in rela-
tion to the R-wave.
2. The T-wave may be detected and incorrectly classified as a PVC or high heart
rate alarm.
Fig. 107. Example 11 - Tall P and T-Waves
Correction
In most cases, large T and P waves may be addressed by reconfiguring different lead
placement. In some conditions, such as extreme atrial hypertrophy, hyperkalemia, or
decreased ventricular voltage, the P and T waves might be as large as the R-wave,
despite careful lead selection.
placement. In some conditions, such as extreme atrial hypertrophy, hyperkalemia, or
decreased ventricular voltage, the P and T waves might be as large as the R-wave,
despite careful lead selection.
Despite a small R-wave and large T-wave, the system is counting the heart rate accu-
rately (fig. 107).
rately (fig. 107).