An ontology-based system for representation and diagnosis of electrocardiogram (ECG) data

Graduation date: 2006Electrocardiogram (ECG) data are stored and analyzed in different formats,\ud devices, and computer platforms. There is a need to have an independent platform\ud to support ECG processes among different resources for the purposes of improving\ud the quality of health care and proliferating the results from research. Currently,\ud ECG devices are proprietary. Devices from different manufacturers cannot\ud communicate with each other. It is crucial to have an open standard to manage\ud ECG data for representation and diagnosis.\ud This research explores methods for representation and diagnosis of ECG by\ud developing an Ontology for shared ECG data based on the Health Level Seven\ud (HL7) standard. The developed Ontology bridges the conceptual gap by\ud integrating ECG waveform data, HL7 standard data descriptions, and cardiac\ud diagnosis rules. The Ontology is encoded in Extensible Markup Language (XML)\ud providing human and machine readable format. Thus, the interoperability issue is\ud resolved and ECG data can be shared among different ECG devices and systems.\ud This developed Ontology also provides a mechanism for diagnostic decision\ud support through an automated ECG diagnosis system for a medical technician or\ud physician in the diagnosis of cardiac disease. An experiment was conducted to\ud validate the interoperability of the Ontology, and also to assess the accuracy of the\ud diagnosis model provided through the Ontology. Results showed 100%\ud interoperability from ECG data provided through eight different databases, and a\ud 93% accuracy in diagnosis of normal and abnormal cardiac conditions