Mindray DS USA Inc. WT0707-00000 Manual De Usuario
Panorama™ Operating Instructions
0070-10-0690-01
4 - 13
Arrhythmia and ST Analysis
Arrhythmia Alarms
ST segments are typically calculated on graph paper with a scale of 1cm/mV, and measured
in millimeters where one millimeter is equivalent to 0.1 mV. The reliability of ST
measurements is lowered with the presence of atrial fibrillation, flutter, and erratic baseline
changes.
in millimeters where one millimeter is equivalent to 0.1 mV. The reliability of ST
measurements is lowered with the presence of atrial fibrillation, flutter, and erratic baseline
changes.
Selecting leads that contain the least amount of baseline flutter will improve measurement
accuracy, but accurate ST deviation measurement is dependent on the correct location of the
ISO and ST points.
accuracy, but accurate ST deviation measurement is dependent on the correct location of the
ISO and ST points.
All available ECG leads are analyzed to measure deviations in the ST segment.
The displayed ST data is updated approximately every 10 seconds.
Learning
The process of learning is used to establish normal beat templates or a stable baseline for
accurate ST analysis. To establish this baseline, the system evaluates the first sixteen normal
beats based on readings from leads II, V, and I.
accurate ST analysis. To establish this baseline, the system evaluates the first sixteen normal
beats based on readings from leads II, V, and I.
To establish an accurate baseline, it is recommended that learning be done when the patient
is in stable condition, not moving, and has an ECG rhythm that is free of artifact. Learning
should not be initiated during a primarily ventricular rhythm or other ECG rhythm irregularity
because an ectopic beat may be established as normal.
is in stable condition, not moving, and has an ECG rhythm that is free of artifact. Learning
should not be initiated during a primarily ventricular rhythm or other ECG rhythm irregularity
because an ectopic beat may be established as normal.
Learning automatically occurs when:
• Arrhythmia analysis is turned on
• ST analysis is turned on
• Patient monitoring resumes and patient is removed from the Standby mode
• A 3-wire lead set is in use and the current ECG lead is changed
ECG Filters
The ST segment of an ECG waveform often contains low amplitude signals with low
frequency content. To preserve low frequency signal content, the high pass filter is set to 0.05
Hz when ST analysis is turned on.
frequency content. To preserve low frequency signal content, the high pass filter is set to 0.05
Hz when ST analysis is turned on.
4.4
Arrhythmia Alarms
Arrhythmia alarms are activated based on the patterns in the patient ECG waveform rhythms.
Beat detection for a 5-lead wire set is determined by using a combination of leads II and V.
When using a 3-lead wire set, beat detection is determined by using only the viewed lead.
Beat detection for a 5-lead wire set is determined by using a combination of leads II and V.
When using a 3-lead wire set, beat detection is determined by using only the viewed lead.
The following lethal and non-lethal arrhythmia alarms may be detected by the arrhythmia
algorithm. For additional information regarding alarm behavior at the Panorama Central
Station, refer to ‘‘Alarm Behavior’’ on page 3-1.
algorithm. For additional information regarding alarm behavior at the Panorama Central
Station, refer to ‘‘Alarm Behavior’’ on page 3-1.
NOTE:
Cardiac arrhythmia alarm condition events are detected and
processed by the bedside monitor. When using a Telepack
device, the detection and processing of the event is done by
the Panorama Central Station.
processed by the bedside monitor. When using a Telepack
device, the detection and processing of the event is done by
the Panorama Central Station.