Non-invasive estimation of stroke volume index by using pulse wave transit time both in adult and pediatric population

2011 ◽  
Vol 28 ◽  
pp. 34
Author(s):  
R. Ochiai
Keyword(s):  
Stroke Volume ◽  
Transit Time ◽  
Pulse Wave ◽  
Pediatric Population ◽  
Stroke Volume Index ◽  
Volume Index ◽  
Non Invasive ◽  
Pulse Wave Transit Time

scholarly journals Right ventricular myocardial work: proof-of-concept for non-invasive assessment of right ventricular function

2020 ◽  
Author(s):  
Steele C Butcher ◽  
Federico Fortuni ◽  
Jose M Montero-Cabezas ◽  
Rachid Abou ◽  
Mohammed El Mahdiui ◽  
...  
Keyword(s):  
Cardiovascular Disease ◽  
Stroke Volume ◽  
Right Ventricular ◽  
Systolic Function ◽  
Stroke Volume Index ◽  
Volume Index ◽  
Left Ventricular Ejection ◽  
Non Invasive ◽  
Echocardiographic Parameters ◽  
Global Work

Abstract Aims Right ventricular myocardial work (RVMW) is a novel method for non-invasive assessment of right ventricular (RV) function utilizing RV pressure–strain loops. This study aimed to explore the relationship between RVMW and invasive indices of right heart catheterization (RHC) in a cohort of patients with heart failure with reduced left ventricular ejection fraction (HFrEF), and to compare values of RVMW with those of a group of patients without cardiovascular disease. Methods and results Non-invasive analysis of RVMW was performed in 22 HFrEF patients [median age 63 (59–67) years] who underwent echocardiography and invasive RHC within 48 h. Conventional RV functional measurements, RV global constructive work (RVGCW), RV global work index (RVGWI), RV global wasted work (RVGWW), and RV global work efficiency (RVGWE) were analysed and compared with invasively measured stroke volume and stroke volume index. Non-invasive analysis of RVMW was also performed in 22 patients without cardiovascular disease to allow for comparison between groups. None of the conventional echocardiographic parameters of RV systolic function were significantly correlated with stroke volume or stroke volume index. In contrast, one of the novel indices derived non-invasively by pressure–strain loops, RVGCW, demonstrated a moderate correlation with invasively measured stroke volume and stroke volume index (r = 0.63, P = 0.002 and r = 0.59, P = 0.004, respectively). RVGWI, RVGCW, and RVGWE were significantly lower in patients with HFrEF compared to a healthy cohort, while values of RVGWW were significantly higher. Conclusion RVGCW is a novel parameter that provides an integrative analysis of RV systolic function and correlates more closely with invasively measured stroke volume and stroke volume index than other standard echocardiographic parameters.

scholarly journals Postoperative continuous non-invasive cardiac output monitoring on the ward: a feasibility study

2020 ◽  
Author(s):  
C. E. King ◽  
A. Kermode ◽  
G. Saxena ◽  
P. Carvelli ◽  
M. Edwards ◽  
...  
Keyword(s):  
Stroke Volume ◽  
Clinical Outcomes ◽  
Feasibility Study ◽  
Continuous Monitoring ◽  
Elective Surgery ◽  
Resistance Index ◽  
Stroke Volume Index ◽  
Volume Index ◽  
Cardiac Output Monitoring ◽  
Non Invasive

Abstract Postoperative hypotension is common (occurring in one third of patients) and is associated with worse clinical outcomes. The LiDCO CNAP (continuous non-invasive arterial pressure) device measures haemodynamics but has not been widely adopted in ward environments. Improved early detection of hypotension by CNAP might guide interventions to improve clinical outcomes. We aimed to find the proportion of patients who tolerated LiDCO CNAP for 12 h postoperatively, to unmask episodes of hypotension detected by continuous monitoring and to characterise the haemodynamic profile at the time of hypotension. In this feasibility study, patients undergoing major elective surgery were continuously postoperatively monitored using CNAP. Haemodynamic data gathered from CNAP, including nSVRI (nominal systemic vascular resistance index), nSVI (nominal stroke volume index), SVV (stroke volume variation) and blood pressure, were analysed using Microsoft Excel and GraphPad Prism 8. 104 patients (age (mean ± sd): 68 ± 14, male (56%)) had CNAP sited postoperatively. 39% tolerated the CNAP device for at least 12 h. Within the 104 patients a mean of 81.2 min of hypotension detected by CNAP was not detected by usual care. The proportion of low/normal/high nSVI was 71%, 27% and 2%, nSVRI was 43%, 17% and 40%, respectively. CNAP monitoring was not tolerated for 12 h in the majority of patients. There were many episodes of hypotension unmasked through continuous monitoring. Based on the advanced haemodynamic data provided it is possible that the underlying cause of a third of postoperative hypotensive episodes is vasodilation rather than hypovolaemia. Trial registry number: NCT04010058 (ClinicalTrials.gov) Date of registration: 08/07/2019.

scholarly journals Comparison between continuous non-invasive estimated cardiac output by pulse wave transit time and thermodilution method

2014 ◽  
Vol 17 (4) ◽  
pp. 273 ◽  
Author(s):  
AshishC Sinha ◽  
PreetMohinder Singh ◽  
Navneet Grewal ◽  
Mansoor Aman ◽  
Gerald Dubowitz
Keyword(s):  
Cardiac Output ◽  
Transit Time ◽  
Pulse Wave ◽  
Non Invasive ◽  
Thermodilution Method ◽  
Pulse Wave Transit Time

scholarly journals Pulse wave transit time technique for perioperative non-invasive hemodynamic monitoring

Critical Care ◽  
2014 ◽  
Vol 18 (Suppl 1) ◽  
pp. P139
Author(s):  
J Hruda ◽  
M Chobola ◽  
M Lukes ◽  
P Suk ◽  
J Klimes ◽  
...  
Keyword(s):  
Transit Time ◽  
Hemodynamic Monitoring ◽  
Pulse Wave ◽  
Non Invasive ◽  
Invasive Hemodynamic Monitoring ◽  
Pulse Wave Transit Time

scholarly journals Evaluation of pulse wave transit time analysis for non-invasive cardiac output quantification in pregnant patients

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Emmanuel Schneck ◽  
Pascal Drubel ◽  
Rainer Schürg ◽  
Melanie Markmann ◽  
Thomas Kohl ◽  
...  
Keyword(s):  
Cardiac Output ◽  
Transit Time ◽  
Pulse Wave ◽  
Time Analysis ◽  
Non Invasive ◽  
Pulse Wave Transit Time

Comparison of the ability of two continuous cardiac output monitors to detect stroke volume index: Estimated continuous cardiac output estimated by modified pulse wave transit time and measured by an arterial pulse contour-based cardiac output device

2020 ◽  
pp. 1-6
Author(s):  
Takashi Terada ◽  
Ryoichi Ochiai
Keyword(s):  
Cardiac Output ◽  
Pulse Wave ◽  
Stroke Volume Index ◽  
Continuous Cardiac Output ◽  
Volume Index ◽  
Percentage Error ◽  
Radial Limits ◽  
Pulse Wave Transit Time ◽  
The Mean ◽  
The Difference

BACKGROUND: Estimated continuous cardiac output (esCCO), a non-invasive technique for continuously measuring cardiac output (CO), is based on modified pulse wave transit time, which is determined by pulse oximetry and electrocardiography. OBJECTIVE: We examined the ability of esCCO to detect stroke volume index (SVI) and changes in SVI compared with currently available arterial waveform analysis methods. METHODS: We retrospectively reanalysed 15 of the cases from our previous study on esCCO measurement. SVI was calculated using an esCCO system, measured using the arterial pressure-based CO (APCO) method, and compared with a corresponding intermittent bolus thermodilution CO (ICO) method. Percentage error measurement and statistical methods, including concordance analysis and polar plot analysis, were performed. RESULTS: The difference in the SVI values between esCCO and ICO was -3.0 ± 8.8 ml (percentage error, 33.5%). The mean angular bias was 0.8 and the radial limits of agreement were ± 27.3. The difference in the SVI values between APCO and ICO was 0.9 ± 11.2 ml (percentage error, 42.6%). The mean angular bias was -6.8 and the radial limits of agreement were ± 44.1. CONCLUSION: This study demonstrated that the accuracy, precision, and dynamic trend of esCCO are better than those of APCO.

Sign in / Sign up

Export Citation Format

Share Document