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An optimized method for the estimation of the respiratory rate from electrocardiographic signals: implications for estimating minute ventilation
- Source :
- American Journal of Physiology-Heart and Circulatory Physiology. 307:H437-H447
- Publication Year :
- 2014
- Publisher :
- American Physiological Society, 2014.
-
Abstract
- It is well-known that respiratory activity influences electrocardiographic (ECG) morphology. In this article we present a new algorithm for the extraction of respiratory rate from either intracardiac or body surface electrograms. The algorithm optimizes selection of ECG leads for respiratory analysis, as validated in a swine model. The algorithm estimates the respiratory rate from any two ECG leads by finding the power spectral peak of the derived ratio of the estimated root-mean-squared amplitude of the QRS complexes on a beat-by-beat basis across a 32-beat window and automatically selects the lead combination with the highest power spectral signal-to-noise ratio. In 12 mechanically ventilated swine, we collected intracardiac electrograms from catheters in the right ventricle, coronary sinus, left ventricle, and epicardial surface, as well as body surface electrograms, while the ventilation rate was varied between 7 and 13 breaths/min at tidal volumes of 500 and 750 ml. We found excellent agreement between the estimated and true respiratory rate for right ventricular ( R2 = 0.97), coronary sinus ( R2 = 0.96), left ventricular ( R2 = 0.96), and epicardial ( R2 = 0.97) intracardiac leads referenced to surface lead ECGII. When applied to intracardiac right ventricular-coronary sinus bipolar leads, the algorithm exhibited an accuracy of 99.1% ( R2 = 0.97). When applied to 12-lead body surface ECGs collected in 4 swine, the algorithm exhibited an accuracy of 100% ( R2 = 0.93). In conclusion, the proposed algorithm provides an accurate estimation of the respiratory rate using either intracardiac or body surface signals without the need for additional hardware.
- Subjects :
- Male
medicine.medical_specialty
Time Factors
Respiratory rate
Swine
Physiology
Integrative Cardiovascular Physiology and Pathophysiology
Respiratory Rate
Predictive Value of Tests
Physiology (medical)
Internal medicine
Tidal Volume
Animals
Medicine
cardiovascular diseases
Lung
Tidal volume
business.industry
Body Surface Potential Mapping
Reproducibility of Results
Signal Processing, Computer-Assisted
Respiratory activity
medicine.anatomical_structure
Anesthesia
Models, Animal
cardiovascular system
Cardiology
Electrophysiologic Techniques, Cardiac
Pulmonary Ventilation
Cardiology and Cardiovascular Medicine
business
Algorithms
Respiratory minute volume
Subjects
Details
- ISSN :
- 15221539 and 03636135
- Volume :
- 307
- Database :
- OpenAIRE
- Journal :
- American Journal of Physiology-Heart and Circulatory Physiology
- Accession number :
- edsair.doi.dedup.....48f2c2f2190832a27b2d5f2a82f1804d