Monitoring Cardiac Stress Using Features Extracted From S1 Heart Sounds

Jonathan Herzig, Amitai Bickel, Arie Eitan, Nathan Intrator

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


It is known that acoustic heart sounds carry significant information about the mechanical activity of the heart. In this paper, we present a novel type of cardiac monitoring based on heart sound analysis. Specifically, we study two morphological features and their associations with physiological changes from the baseline state. The framework is demonstrated on recordings during laparoscopic surgeries of 15 patients. Insufflation, which is performed during laparoscopic surgery, provides a controlled, externally induced cardiac stress, enabling an analysis of each patient with respect to their own baseline. We demonstrate that the proposed features change during cardiac stress, and the change is more significant for patients with cardiac problems. Furthermore, we show that other well-known ECG morphology features are less sensitive in this specific cardiac stress experiment.

Original languageEnglish
Article number6975053
Pages (from-to)1169-1178
Number of pages10
JournalIEEE Transactions on Biomedical Engineering
Issue number4
StatePublished - 1 Apr 2015

Bibliographical note

Publisher Copyright:
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  • Biomedical signal processing
  • Cardiology
  • Laparoscopy
  • Morphological features
  • Phonocardiography


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