BeneVision TM80, Руководство оператора

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7 - 28 BeneVision TM80 Telemetry Monitor Operator’s Manual
7.9 QT/QTc Interval Monitoring
The QT interval is defined as the time between the beginning of the Q-wave and the end of
the T-wave. It measures the total duration of ventricular depolarization (QRS duration) and
repolarization (ST-T). QT interval monitoring can assist in the detection of long QT
syndrome.
The QT interval has an inverse relationship to heart rate. Faster heart rates shorten the QT
interval and slower heart rates prolong the QT interval. Therefore, several formulas can be
used to correct the QT interval for heart rate. The heart rate corrected QT interval is
abbreviated as QTc.
QT/QTc interval monitoring is intended for adult and pediatric patients.
Options Description Settings*
ST-I,
ST-II,
ST-III,
ST-aVR,
ST-aVF,
ST-V,
ST-Va,
ST-Vb
These options are displayed
when
ST Alarm Mode is set to
Absolute .
The lead label behind ST is
consistent with the ECG cable
type selected.
On, Off
Alarm high limit range:
0.2 mV to 2.0 mV; the default is 0.2 ; the step
is 0.01mV.
Alarm low limit range:
-2.0 mV to 0 mV; the default is -0.2 ; the step
is 0.01mV.
Alarm priority: Low, Med , High
ST Single These options are displayed
when
ST Alarm Mode is set to
Relative .
On, Off
Alarm high limit range:
0 mV to 2.0 mV; the default is 0.1 ; the step is
0.01mV.
Alarm low limit range:
-2.0 mV to 0 mV; the default is -0.1 ; the step
is 0.01mV.
Alarm priority: Low, Med , High
ST Dual On, Off
Alarm high limit range:
0 mV to 2.0 mV; the default is 0.1 ; the step is
0.01mV.
Alarm low limit range:
-2.0 mV to 0 mV; the default is -0.1 ; the step
is 0.01mV.
Alarm priority: Low, Med , High
* The factory default settings are in bold.