Philips IntelliVue MX800 - Selecting Positions of Va and Vb Chest Leads (for 6-lead placement); 1 In the Setup ECG menu, select Va Lead.; 2 Select the position used from the list.; 3 Select Vb Lead and select the position used from the list.

5 ECG, Arrhythmia, ST and QT Monitoring
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usually leads to a wandering or rough baseline. In the operating room, the Filter reduces
artifacts and interference from electrosurgical units. Under normal measurement conditions,
selecting
Filter may suppress the QRS complexes too much and thus interfere with the clinical
evaluation of the ECG displayed on the monitor. This does not affect the ECG analysis
performed by the monitor.
If
AutoFilter is set to On in Configuration Mode, the filter setting will automatically be set to
Filter if electromagnetic interference is detected.
–
Diag: Use when diagnostic quality is required. The unfiltered ECG wave is displayed so that
changes such as R-wave notching or discrete elevation or depression of the ST segments are
visible.
The setting
Diag selects the highest available ECG bandwidth which is 0.05 to 150 Hz for the
Adult, Pedi and Neo patient category. The term "diagnostic" relates only to the ECG
bandwidth requirements for diagnostic electrocardiographic devices as outlined in the ANSI/
AAMI standard EC11-1991.
Selecting Positions of Va and Vb Chest Leads (for
6-lead placement)
The two chest leads for the 6-lead placement can be positioned at any two of the V1 to V6 positions.
Select the positions you have used in the
Setup ECG menu, so that the chest leads will be correctly
labeled.
1 In the Setup ECG menu, select Va Lead.
2 Select the position used from the list.
3 Select Vb Lead and select the position used from the list.
Choosing EASI or Standard Lead Placement
You must enable either standard lead placement or EASI lead placement.
•In the
Setup ECG menu, select Lead Placement and then Standard or EASI.
EASI is shown beside the 1 mV calibration bar on the ECG wave on the display, and EASI is marked on
any recorder strips and printouts.
See the section on “EASI ECG Lead Placement” on page 123 for electrode placement diagrams.
About ECG Leads
To make it possible to compare measured ECG signals, the electrodes (or lead sets) are placed in
standardized positions, forming so-called "leads". To obtain ECG signals optimized for use in
diagnosis and patient management in different care environments, different lead sets in varying lead
placements can be used. You can use either standard lead placements or EASI lead placements with
this monitor.
When placing electrodes, choose a flat, non-muscular site where the signal will not be interfered with
by either movement or bones. Correct lead placement is always important for accurate diagnosis.
Especially in the precordial leads, which are close to the heart, QRS morphology can be greatly altered
if an electrode is moved away from its correct location.