QT interval monitoring system with alarms and trending

An ECG system for monitoring QT interval information comprising:

• a source of ECG signal information;
• a QT interval processor responsive to ECG signal information which operates to periodically produce QT interval information;
• a storage device responsive to the QT interval processor which stores QT interval information as a function of time;
• a trend processor, responsive to QT interval information which operates to calculate a trend of QT information over a period of time, wherein the QT interval information which is trended further includes one or more of the QT interval, QTc values, and dQTc values;
• a QT interval correction processor which produces the QTc values corrected for a patient heart rate;
• a QT interval variation processor which produces dQTc values relative to a baseline QTc value;
• a display responsive to the trend processor and operable to display a trend of QT information over the period of time;
• and
• a user control operable to select the period of time over which the trend of QT information is displayed.