Abstract
Cardiovascular disease is the main cause of death in Europe, and early detection of increased cardiovascular risk (CR) is of clinical importance. Pulse wave analysis based on pulse oximetry has proven useful for the recognition of increased CR. The current study provides a detailed description of the pulse wave analysis technology and its clinical application. A novel matching pursuit-based feature extraction algorithm was applied for signal decomposition of the overnight photoplethysmographic pulse wave signals obtained by a single-pulse oximeter sensor. The algorithm computes nine parameters (pulse index, SpO2 index, pulse wave amplitude index, respiratory-related pulse oscillations, pulse propagation time, periodic and symmetric desaturations, time under 90 % SpO2, difference between pulse and SpO2 index, and arrhythmia). The technology was applied in 631 patients referred for a sleep study with suspected sleep apnea. The technical failure rate was 1.4 %. Anthropometric data like age and BMI correlated significantly with measures of vascular stiffness and pulse rate variability (PPT and age r = −0.54, p < 0.001, PR and age r = −0.36, p < 0.01). The composite biosignal risk score showed a dose–response relationship with the number of CR factors (p < 0.001) and was further elevated in patients with sleep apnea (AHI ≥ 15n/h; p < 0.001). The developed algorithm extracts meaningful parameters indicative of cardiorespiratory and autonomic nervous system function and dysfunction in patients suspected of SDB.
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Abbreviations
- AHI:
-
Apnea–Hypopnea Index
- Arryth:
-
Irregular heart rate
- BMI:
-
Body mass index
- CV:
-
Cardiovascular
- CPAP:
-
Continuous positive airway pressure
- MAD:
-
Mean absolute deviation
- MP:
-
Matching pursuit
- OSA:
-
Obstructive sleep apnea
- PASD:
-
Periodic and symmetric desaturations
- PR:
-
Pulse rate
- PWA:
-
Pulse wave amplitude
- PPT:
-
Pulse propagation time
- PR_SpO2_I:
-
Difference between pulse index and SpO2 index
- RRPO:
-
Respiratory-related pulse oscillation
- SDB:
-
Sleep-disordered breathing
- SpO2 :
-
Oxygen saturation
- TimeBelow90:
-
Time under 90 % SpO2
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Acknowledgments
Funding
The study was supported by Weinmann Geräte für Medizin GmbH & Co.KG, MCC GmbH & Co.KG, the German Ministry for Education and Science (BMBF), the Swedish Heart and Lung Foundation, the Gothenburg Medical Society and the Sahlgrenska Academy at the University of Gothenburg, Sweden.
Other contributions
The authors would like to express their gratitude for the support throughout the study to Jeanette Norum (Sahlgrenska), Lena Engelmark (Sahlgrenska), Martina Bögel (Weinmann, Hamburg, Germany), Matthias Schwaibold (MCC, Karlsruhe, Germany), and Bernd Schöller (MCC, Karlsruhe, Germany) for their technical and intellectual input during different parts of the study.
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Sommermeyer, D., Zou, D., Ficker, J.H. et al. Detection of cardiovascular risk from a photoplethysmographic signal using a matching pursuit algorithm. Med Biol Eng Comput 54, 1111–1121 (2016). https://doi.org/10.1007/s11517-015-1410-8
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DOI: https://doi.org/10.1007/s11517-015-1410-8