Arterial pulse wave analysis based on PPG and EMFi measurements

Author(s):  
M. Huotari ◽  
A. Vehkaoja ◽  
K. Maatta ◽  
J. Kostamovaara
2002 ◽  
Vol 103 (2) ◽  
pp. 143-149 ◽  
Author(s):  
Jaap J. REMMEN ◽  
Wim R.M. AENGEVAEREN ◽  
Freek W.A. VERHEUGT ◽  
Tjeerd VAN DER WERF ◽  
Hans E. LUIJTEN ◽  
...  

Non-invasive continuous monitoring of cardiac output could be very useful in clinical care and in research settings, particularly in elderly subjects. We studied whether Finapres arterial pulse wave analysis with Modelflow® is a reliable non-invasive method for the assessment of cardiac output in healthy elderly subjects. We compared Modelflow® cardiac output (MFCO) with thermodilution cardiac output (TDCO) in 28 healthy subjects, aged 70±4years (mean±S.D.). TDCO was measured during right-sided heart catheterization, while MFCO was calculated with Modelflow® software from non-invasive arterial Finapres blood pressure, which was measured simultaneously. The two methods were compared using a paired t-test, by Pearson correlation, and by Bland–Altman analysis. TDCO was 6.4±1.1litres/min (mean±S.D.) and MFCO was 4.7±1.3litres/min (P<0.001). There was no significant correlation between MFCO and TDCO (r = 0.28, P = 0.13). Mean difference (bias) was -1.7litres/min (S.E.M. 0.27litres/min), with an S.D. (precision) of 1.5litres/min. The 95% limits of agreement were -4.6 to +1.1litres/min. In conclusion, non-invasive MFCO values differed significantly from and showed no significant correlation with invasively determined TDCO values in the normal range. Although simple, non-invasive and patient-friendly, the Modelflow® method is inaccurate for assessment of cardiac output without invasive calibration.


2006 ◽  
Vol 7 (6) ◽  
pp. 532-535 ◽  
Author(s):  
Jeffrey J. Kim ◽  
W Jeffrey Dreyer ◽  
Anthony C. Chang ◽  
John P. Breinholt ◽  
Ronald G. Grifka

2002 ◽  
Vol 103 (2) ◽  
pp. 143 ◽  
Author(s):  
Jaap J. REMMEN ◽  
Wim R. M. AENGEVAEREN ◽  
Freek W. A. VERHEUGT ◽  
Tjeerd van der WERF ◽  
Hans E. LUIJTEN ◽  
...  

PLoS ONE ◽  
2019 ◽  
Vol 14 (1) ◽  
pp. e0210572
Author(s):  
Johanna Sandmann ◽  
Thorsten Sichtermann ◽  
Franziska Sonja Müschenich ◽  
Hadi Nasri ◽  
Sarah Heringer ◽  
...  

1992 ◽  
Vol 15 (1) ◽  
pp. 49-54 ◽  
Author(s):  
T. Yambe ◽  
S. Nitta ◽  
Y. Katahira ◽  
T. Sonobe ◽  
S. Naganuma ◽  
...  

Circulatory maintenance with a left ventricular assist device (LVAD) alone during cardiac arrest until heart transplantation has been evaluated. To assess the effect on the autonomic nervous system, the sympathetic neurogram was analyzed by power spectrum and coherence function. LVAD were inserted between the left atrium and the descending aorta in seven adult mongrel dogs and ventricular fibrillation was induced electrically. Renal sympathetic nerve activity (RSNA) was detected by bipolar electrodes attached to the left renal sympathetic nerve. Values of squared coherence between the arterial pulse wave and RSNA were calculated. Under the condition of circulatory maintenance with only LVAD, coherence at the cardiac rhythm frequency was decreased, and coherence at the LVAD pumping rhythm frequency was increased. These results indicate that the arterial pulse wave observed during maintenance of the circulation with only LVAD contributed to the sympathetic neurogram.


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