Personne
Vasiliki Bikia
Cette personne n’est plus à l’EPFL
Publications associées (28)
Method and apparatus for non-invasively computing cardio-vasculature parameters using morphology of uncorrelated pressure wave signal
Nikolaos Stergiopoulos, Vasiliki Bikia
[0054] Methods are provided for estimating key reliably and accurately predicting cardiac output using a limited set of non-invasively monitored physiologic inputs, and a calibrated one- dimensional arterial tree model, a database of synthetic data generat ...
2024Novel theory and potential applications of central diastolic pressure decay time constant
Nikolaos Stergiopoulos, Georgios Rovas, Sokratis Anagnostopoulos, Vasiliki Bikia, Patrick Segers
Central aortic diastolic pressure decay time constant ( ) is according to the two-element Windkessel model equal to the product of total peripheral resistance (R) times total arterial compliance (C ). As such, it is related to arterial stiffness, which has ...
2024Apparatus for non-invasively computing cardio-vasculature parameters using morphology of uncalibrated pressure wave signal
Nikolaos Stergiopoulos, Georgios Rovas, Vasiliki Bikia
Systems and apparatus are provided for using a non-invasively monitored uncalibrated pressure signal from a patient to compute cardiac output and other cardio-vascular parameters, thereby providing safe, effective, reliable and low cost monitoring of patie ...
2024Quantification of the Phenomena Affecting Reflective Arterial Photoplethysmography
Nikolaos Stergiopoulos, Georgios Rovas, Vasiliki Bikia
Photoplethysmography (PPG) is a widely emerging method to assess vascular health in humans. The origins of the signal of reflective PPG on peripheral arteries have not been thoroughly investigated. We aimed to identify and quantify the optical and biomecha ...
MDPI2023Cardiac output estimated from an uncalibrated radial blood pressure waveform: validation in an in-silico-generated population
Nikolaos Stergiopoulos, Georgios Rovas, Vasiliki Bikia
Background: Cardiac output is essential for patient management in critically ill patients. The state-of-the-art for cardiac output monitoring bears limitations that pertain to the invasive nature of the method, high costs, and associated complications. Hen ...
FRONTIERS MEDIA SA2023Arterial pulse wave modeling and analysis for vascular-age studies: a review from VascAgeNet
Vasiliki Bikia, Patrick Segers
Arterial pulse waves (PWs) such as blood pressure and photoplethysmogram (PPG) signals contain a wealth of information on the cardiovascular (CV) system that can be exploited to assess vascular age and identify individuals at elevated CV risk. We review th ...
AMER PHYSIOLOGICAL SOC2023Design and computational optimization of compliance-matching aortic grafts
Nikolaos Stergiopoulos, Georgios Rovas, Vasiliki Bikia
Introduction: Synthetic vascular grafts have been widely used in clinical practice for aortic replacement surgery. Despite their high rates of surgical success, they remain significantly less compliant than the native aorta, resulting in a phenomenon calle ...
FRONTIERS MEDIA SA2023On the similarity between aortic and carotid pressure diastolic decay: a mathematical modelling study
Nikolaos Stergiopoulos, Georgios Rovas, Sokratis Anagnostopoulos, Vasiliki Bikia
Aortic diastolic pressure decay (DPD) has been shown to have considerable pathophysiological relevance in the assessment of vascular health, as it is significantly affected by arterial stiffening. Nonetheless, the aortic pressure waveform is rarely availab ...
NATURE PORTFOLIO2023Arterial Wave Reflection and Aortic Valve Stenosis: Diagnostic Challenges and Prognostic Significance
Nikolaos Stergiopoulos, Georgios Rovas, Vasiliki Bikia, Stamatia Zoi Pagoulatou
IntroductionArterial wave reflection is an important component of the left ventricular afterload, affecting both pressure and flow to the aorta. The aim of the present study was to evaluate the impact of wave reflection on transvalvular pressure gradients ...
FRONTIERS MEDIA SA2022Validation of a Non-invasive Inverse Problem-Solving Method for Stroke Volume
Nikolaos Stergiopoulos, Georgios Rovas, Vasiliki Bikia, Stamatia Zoi Pagoulatou, Emma Marie Roussel
Stroke volume (SV) is a major biomarker of cardiac function, reflecting ventricular-vascular coupling. Despite this, hemodynamic monitoring and management seldomly includes assessments of SV and remains predominantly guided by brachial cuff blood pressure ...
FRONTIERS MEDIA SA2022