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Definition of Fiducial Points in the Normal Seismocardiogram

Sørensen, Kasper ; Schmidt, Samuel E ; Jensen, Ask S ; Søgaard, Peter ; Struijk, Johannes J

Scientific reports, 2018-10, Vol.8 (1), p.15455-15455, Article 15455 [Periódico revisado por pares]

England: Nature Publishing Group

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Título:
Definition of Fiducial Points in the Normal Seismocardiogram
Autor: Sørensen, Kasper ; Schmidt, Samuel E ; Jensen, Ask S ; Søgaard, Peter ; Struijk, Johannes J
Assuntos: Accelerometry - methods ; Adult ; Aged ; Aged, 80 and over ; Aorta ; Aortic valve ; Data processing ; Diastole ; Echocardiography ; EKG ; Electrocardiography ; Fiducial Markers ; Heart Function Tests - methods ; Heart Valves - physiology ; Humans ; Image Processing, Computer-Assisted ; Middle Aged ; Mitral valve ; Myocardial Contraction ; Reference Values ; Reproducibility of Results ; Signal Processing, Computer-Assisted ; Systole ; Ultrasonic imaging ; Ultrasound ; Ventricle ; Vibration ; Young Adult
É parte de: Scientific reports, 2018-10, Vol.8 (1), p.15455-15455, Article 15455
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Descrição: The purpose of this work is to define fiducial points in the seismocardiogram (SCG) and to correlate them with physiological events identified in ultrasound images. For 45 healthy subjects the SCG and the electrocardiogram (ECG) were recorded simultaneously at rest. Immediately following the SCG and ECG recordings ultrasound images of the heart were also obtained at rest. For all subjects a mean SCG signal was calculated and all fiducial points (peaks and valleys) were identified and labeled in the same way across all signals. Eight physiologic events, including the valve openings and closings, were annotated from ultrasound as well and the fiducial points were correlated with those physiologic events. A total of 42 SCG signals were used in the data analysis. The smallest mean differences (±SD) between the eight events found in the ultrasound images and the fiducial points, together with their correlation coefficients (r) were: atrial systolic onset: -2 (±16) ms, r = 0.75 (p < 0.001); peak atrial inflow: 13 (±19) ms, r = 0.63 (p < 0.001); mitral valve closure: 4 (±11) ms, r = 0.71 (p < 0.01); aortic valve opening: -3 (±11) ms, r = 0.60 (p < 0.001); peak systolic inflow: 13 (±23) ms, r = 0.42 (p < 0.01); aortic valve closure: -5 (±12) ms, r = 0.94 (p < 0.001); mitral valve opening: -7 (±19) ms, r = 0.87 (p < 0.001) and peak early ventricular filling: -18 (±28 ms), r = 0.79 (p < 0.001). In conclusion eight physiologic events characterizeing the cardiac cycle, are associated with reproducible, well-defined fiducial points in the SCG.
Editor: England: Nature Publishing Group
Idioma: Inglês

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Definition of Fiducial Points in the Normal Seismocardiogram

Sørensen, Kasper ; Schmidt, Samuel E ; Jensen, Ask S ; Søgaard, Peter ; Struijk, Johannes J

England: Nature Publishing Group

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