التفاصيل البيبلوغرافية
| العنوان: |
Continuous Monitoring of Aortic Valve Opening in Rotary Blood Pump Patients. |
| المؤلفون: |
Granegger, Marcus1, Masetti, Marco2, Laohasurayodhin, Ravi1, Schloeglhofer, Thomas1, Zimpfer, Daniel3, Schima, Heinrich4, Moscato, Francesco5 |
| المصدر: |
IEEE Transactions on Biomedical Engineering. Jun2016, Vol. 63 Issue 6, p1201-1207. 7p. |
| مصطلحات موضوعية: |
HEART assist devices, HEART function tests, AORTIC valve diseases, ECHOCARDIOGRAPHY, HEMODYNAMICS |
| مستخلص: |
Goal: Rotary blood pumps (RBPs) typically support the left ventricle by pumping blood from the ventricle to the aorta, partially bypassing the aortic valve (AV). Monitoring the AV opening during RBP support would provide important information about cardiac–pump interaction. However, currently this information is not continuously available. In this study, an algorithm to determine AV opening using available pump signals was evaluated in humans. Methods: Pump speed changes were performed in 15 RBP patients to elicit opening of the AV. Simultaneously to pump data recordings, the AV was continuously monitored using echocardiography. The algorithm, which classifies the AV state utilizing three features (skewness, kurtosis, and crest factor) calculated from the pump flow waveform, was compared to echocardiography by using cross-validation analysis. Additionally, numerical simulation was used to evaluate effects of different pump characteristics and cannula length, as well as mitral valve insufficiency on the AV opening detection method. Results: More than 7000 heart beats were analyzed. The correct classification rate using the developed algorithm was 91.1% (sensitivity 91.0%, specificity 91.2%). Numerical simulations showed that the flow waveform shape used for AV opening detection is preserved under the different conditions studied. Conclusion: This study demonstrates that the AV opening can be reliably detected in RBP patients using available pump data. Significance: Once implemented in RBP controllers, this method will provide a novel tool to improve the management of RBP patients, particularly for adjustments of the pump speed and flow and for the evaluation of the assisted cardiac function. [ABSTRACT FROM AUTHOR] |
|
Copyright of IEEE Transactions on Biomedical Engineering is the property of IEEE and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Business Source Index |
