Automatic Methods to Extract New York Heart Association Classification from Clinical Notes.

Journal: Proceedings. IEEE International Conference on Bioinformatics and Biomedicine
Published Date: Dec 18, 2017

Abstract

Cardiac Resynchronization Therapy (CRT) is an established pacing therapy for heart failure patients. The New York Heart Association (NYHA) classification is often used as a measure of a patient's response to CRT. Identifying NYHA class for heart failure patients in an electronic health record (EHR) consistently, over time, can provide better understanding of the progression of heart failure and assessment of CRT response and effectiveness. However, NYHA is rarely stored in EHR structured data such information is often documented in unstructured clinical notes. In this study, we thus investigated the use of natural language processing (NLP) methods to identify NYHA classification from clinical notes. We collected 6,174 clinical notes that were matched with hospital-specific custom NYHA class diagnosis codes. Machine-learning based methods performed similar with a rule-based method. The best machine-learning method, support vector machine with n-gram features, performed the best (93% F-measure). Further validation of the findings is required.

Authors

  • Rui Zhang
    Department of Cardiology, Zhongda Hospital, Medical School of Southeast University, Nanjing, China.
  • Sisi Ma
    Institute for Health Informatics, University of Minnesota, Minneapolis, MN, USA.
  • Liesa Shanahan
    Medtronic, Inc., Minneapolis, MN, USA.
  • Jessica Munroe
    Medtronic, Inc., Minneapolis, MN, USA.
  • Sarah Horn
    Medtronic, Inc., Minneapolis MN, USA.
  • Stuart Speedie
    Institute for Health Informatics, University of Minnesota, Minneapolis, MN, USA.

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