Koninklijke Philips Corporation N.V.

Philips Intellectual Property & Standards Gmbh

James E Lindauer

Richard Earl Gregg

Sophia Huai Zhou

Eric Helfenbein

Saeed Babaeizadeh

Bernd Wilm

Kathryn Ann Egan

Scott Kresge

Nancy Mutch

Francis P Michaud

Shankar Reddy

Kathryn A Egan

An ECG monitoring system continuously monitors a patient's ECG waveform and periodically identifies the patient's QT interval. QT interval values are averaged over time and a corrected interval value QTc and a change in QTc relative to a baseline, dQTc, are periodically produced. An alarm is responsive to updated QT interval values and issues an alarm whenever a selected QT value exceeds an alarm limit. The periodically produced QT interval values are stored and a trend display may be produced showing changes in the QT interval information over different periods of time. The trend display may selectively display the trend information either graphically or in tabular form.

QT interval monitoring system with alarms and trending

A diagnostic ECG system analyzes lead traces for evidence of ST elevation in the lead signals. The pattern of ST elevation in leads having predetermined vantage points to the electrical activity of the heart and, in some instances, the presence of ST depression in certain other leads, identifies a specific coronary artery or branch as the culprit coronary artery for an acute ischemic event. The identity of the culprit coronary artery or branch is presented to the interventional cardiologist so that the correct coronary artery is accessed and the obstruction cleared. The technique can be used with standard 12-lead ECG systems as well as with ECG systems using fewer or more leads.

Automated identification of culprit coronary artery

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San Francisco, CA, United States of America

James E Lindauer