Evaluation of respiratory influences on left ventricular function by means of echocardiographic approach

A procedure to automatically extract the beat-to-beat series of well-known clinical parameters from the left ventricular volume signal obtained by the acoustic quantification technique is validated in normal subjects and chronic heart failure patients (NYHA class II-III). The end systolic and diasto...

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Bibliographic Details
Published inComputers in Cardiology 1997 pp. 403 - 406
Main Authors Porta, A., Baselli, G., Turiel, M., Crema, C., Dalla Vecchia, L., Lucini, D., Caiani, E., Malliani, A., Pagani, M., Cerutti, S.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1997
Subjects
Blood pressure
Electrocardiography
Finite impulse response filter
Frequency
Heart
Pathology
Portals
Real time systems
SONOS devices
Ultrasonic imaging
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Summary:A procedure to automatically extract the beat-to-beat series of well-known clinical parameters from the left ventricular volume signal obtained by the acoustic quantification technique is validated in normal subjects and chronic heart failure patients (NYHA class II-III). The end systolic and diastolic volume, the contribution of the atrial contraction to the ventricular filling and the ejection fraction provide a vivid distinction between normal and pathological subjects. However a large amount of variability at the respiratory frequency is observed. The respiratory-related variability of the left ventricular volume parameters could be related to the capability of the heart to adapt to changes of the venous return and, therefore, could be used as an index of the cardiac mechanical efficiency.
ISBN:9780780344457
0780344456
ISSN:0276-6547
DOI:10.1109/CIC.1997.647918