Leon J. Montenij

ORCID: 0000-0001-9001-3953
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About
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Research Areas
  • Hemodynamic Monitoring and Therapy
  • Non-Invasive Vital Sign Monitoring
  • Cardiovascular Health and Disease Prevention
  • Respiratory Support and Mechanisms
  • Blood Pressure and Hypertension Studies
  • Cardiac, Anesthesia and Surgical Outcomes
  • Cardiac Arrest and Resuscitation
  • Intensive Care Unit Cognitive Disorders
  • Mechanical Circulatory Support Devices
  • Chronic Obstructive Pulmonary Disease (COPD) Research
  • Heart Rate Variability and Autonomic Control
  • Vascular Procedures and Complications
  • Central Venous Catheters and Hemodialysis
  • Cardiovascular Function and Risk Factors
  • Heart Failure Treatment and Management
  • Optical Imaging and Spectroscopy Techniques
  • ECG Monitoring and Analysis
  • Family and Patient Care in Intensive Care Units
  • COVID-19 Clinical Research Studies
  • Pleural and Pulmonary Diseases
  • Anesthesia and Pain Management
  • Psychedelics and Drug Studies
  • Sepsis Diagnosis and Treatment
  • Vascular anomalies and interventions
  • Cardiac Structural Anomalies and Repair

Catharina Ziekenhuis
2020-2025

Radboud University Nijmegen
2020-2025

Eindhoven University of Technology
2023-2025

Philips (Netherlands)
2023

Signal Processing (United States)
2021

University Medical Center Utrecht
2011-2017

University Hospital Heidelberg
2011

University Medical Center
2011

Heidelberg University
2011

Haga Hospital
2009

Unobtrusive pulse rate monitoring by continuous video recording, based on remote photoplethysmography (rPPG), might enable early detection of perioperative arrhythmias in general ward patients. However, the accuracy an rPPG-based machine learning model to monitor during sinus rhythm and is unknown. We conducted a prospective, observational diagnostic study cohort with high prevalence (patients undergoing elective electrical cardioversion). Pulse was assessed rPPG via visible light camera ECG...

10.1007/s10877-025-01263-5 article EN cc-by Journal of Clinical Monitoring and Computing 2025-01-29

Mechanical ventilation is a lifesaving treatment for critically ill patients in an Intensive Care Unit (ICU) or during surgery. However, one potential harm of mechanical related to patient-ventilator asynchrony (PVA). PVA can cause discomfort the patient, damage lungs, and increase length stay ICU on ventilator. Therefore, automated detection algorithms are being developed detect classify PVAs, with goal optimizing ventilation. development these often requires large labeled datasets;...

10.1016/j.cmpb.2022.107333 article EN cc-by Computer Methods and Programs in Biomedicine 2023-01-02

ObjectiveThe corrected left ventricular ejection time (cLVET) comprises the phase from aortic valve opening to closure for heart rate. As a surrogate measure cLVET, carotid flow (ccFT) has been proposed in previous research. The aim of this study was assess clinical agreement between cLVET and ccFT dynamic setting.MethodsTwenty-five patients with severe stenosis (AS) were selected transcatheter replacement (TAVR). derived outflow tract (LVOT) common artery (CCA), respectively, using pulsed...

10.1016/j.ultrasmedbio.2023.12.013 article EN cc-by Ultrasound in Medicine & Biology 2024-01-19

We provide new insights into the performance of camera-based heart and respiration rate extraction evaluate its usability for replacing spot checks conducted in general ward. A study was performed comprising 36 ICU patients recorded a total time 699 h. The 5 beats/minute agreement between camera ECG-based measurements 81.5%, with coverage 81.9%, where largest gap 239 min. challenges encountered monitoring were limited visibility patient’s face irregular rates, which led to poor camera-...

10.3390/app15073422 article EN cc-by Applied Sciences 2025-03-21
Lucas M. Fleuren Tariq A. Dam Michele Tonutti Daan P. de Bruin Robbert C. A. Lalisang and 95 more Diederik Gommers Olaf L. Cremer Rob J. Bosman Sander Rigter Evert‐Jan Wils Tim Frenzel Dave A. Dongelmans Remko de Jong Marco Peters Marlijn J. A. Kamps Dharmanand Ramnarain Ralph Nowitzky Fleur G. C. A. Nooteboom Wouter de Ruijter Louise C. Urlings‐Strop Ellen G. M. Smit D. Jannet Mehagnoul‐Schipper Tom Dormans Cornelis P. C. de Jager Stefaan H. A. Hendriks Sefanja Achterberg Evelien Oostdijk Auke C. Reidinga Barbara Festen‐Spanjer Gert B. Brunnekreef Alexander D. Cornet Walter van den Tempel Age D. Boelens Peter Koetsier Judith Lens Harald J. Faber A. Karakus Robert Entjes Paul de Jong Thijs C. D. Rettig M. Sesmu Arbous Sebastiaan J. J. Vonk Mattia Fornasa Tomas Machado Taco Houwert Hidde Hovenkamp Roberto Noorduijn Londono Davide Quintarelli Martijn G. Scholtemeijer Aletta A. de Beer Giovanni Cinà Adam Kantorik Tom de Ruijter Willem E. Herter Martijn Beudel Armand R. J. Girbes Mark Hoogendoorn Patrick Thoral Paul Elbers Julia Koeter Roger van Rietschote Merijn C. Reuland Laura van Manen Leon J. Montenij Jasper van Bommel Roy van den Berg Ellen van Geest Anisa Hana Bas van den Bogaard Peter Pickkers Pim van der Heiden Claudia van Gemeren Arend Jan Meinders Martha de Bruin Emma Rademaker Frits van Osch Martijn D. de Kruif Nicolas F. Schroten Klaas Sierk Arnold J. W. Fijen Jacomar J. M. van Koesveld Koen S. Simons Joost A. M. Labout Bart van de Gaauw Michaël Kuiper Albertus Beishuizen Dennis Geutjes Johan Lutisan Bart Grady Remko van den Akker Tom A. Rijpstra Wim Boersma Daniël Pretorius Menno Beukema Bram Simons A. A. Rijkeboer Marcel Ariës Niels C. Gritters van den Oever Martijn van Tellingen Annemieke Dijkstra

Determining the optimal timing for extubation can be challenging in intensive care. In this study, we aim to identify predictors failure critically ill patients with COVID-19.We used highly granular data from 3464 adult COVID multicenter Dutch Data Warehouse, including demographics, clinical observations, medications, fluid balance, laboratory values, vital signs, and life support devices. All intubated at least one attempt were eligible analysis. Transferred patients, admitted less than 24...

10.1186/s13054-021-03864-3 article EN cc-by Critical Care 2021-12-01

To explore if change in the extent of emphysema correlated with lung function, effect resection emphysematous tissue was studied by computed tomography (CT) densitometry. In addition, current authors how surgery-induced related to density control subjects. total, 30 patients (14 females; mean± sd age 59±10 yrs) severe before and 3 months after volume reduction surgery (LVRS), 48 moderate 76 subjects were investigated. Lung (15th percentile point) both lungs heterogeneity between 12...

10.1183/09031936.00056206 article EN European Respiratory Journal 2007-03-01

Uncalibrated arterial waveform analysis enables dynamic preload assessment in a minimally invasive fashion. Evidence about the validity of technique patients with impaired left ventricular function is scarce, while adequate cardiac would be great value these patients. The aim this study was to investigate diagnostic accuracy stroke volume variation (SVV) measured FloTrac/Vigileo™ system function. In prospective, observational study, 22 ejection fraction 40 % or less undergoing elective...

10.1007/s10877-015-9743-2 article EN cc-by Journal of Clinical Monitoring and Computing 2015-07-30

Background and objectives Currently, no evidence-based criteria exist for decision making in the post anesthesia care unit (PACU). This could be valuable allocation of postoperative patients to appropriate level beneficial patient outcomes such as unanticipated intensive (ICU) admissions. The aim is assess whether inclusion intra- factors improves prediction deterioration ICU Methods A retrospective observational cohort study was performed between January 2013 December 2017 a tertiary Dutch...

10.1371/journal.pone.0286818 article EN cc-by PLoS ONE 2023-08-03
Tariq A. Dam Luca F. Roggeveen Fuda van Diggelen Lucas M. Fleuren Ameet R. Jagesar and 95 more Martijn Otten Heder de Vries Diederik Gommers Olaf L. Cremer Rob J. Bosman Sander Rigter Evert‐Jan Wils Tim Frenzel Dave A. Dongelmans Remko de Jong Marco A. A. Peters Marlijn J. A. Kamps Dharmanand Ramnarain Ralph Nowitzky Fleur G. C. A. Nooteboom Wouter de Ruijter Louise C. Urlings‐Strop Ellen G. M. Smit D. Jannet Mehagnoul‐Schipper Tom Dormans Cornelis P. C. de Jager Stefaan H. A. Hendriks Sefanja Achterberg Evelien Oostdijk Auke C. Reidinga Barbara Festen‐Spanjer Gert B. Brunnekreef Alexander D. Cornet Walter van den Tempel Age D. Boelens Peter Koetsier Judith Lens Harald J. Faber A. Karakus Robert Entjes Paul de Jong Thijs C. D. Rettig M. Sesmu Arbous Sebastiaan J. J. Vonk Tomas Machado Willem E. Herter Harm‐Jan de Grooth Patrick Thoral Armand R. J. Girbes Mark Hoogendoorn Paul Elbers Julia Koeter Roger van Rietschote Merijn C. Reuland Laura van Manen Leon J. Montenij Jasper van Bommel Roy van den Berg Ellen van Geest Anisa Hana Bas van den Bogaard Peter Pickkers Pim van der Heiden Claudia van Gemeren Arend Jan Meinders Martha de Bruin Emma Rademaker Frits van Osch Martijn D. de Kruif Nicolas F. Schroten Klaas Sierk Arnold J. W. Fijen Jacomar J. M. van Koesveld Koen S. Simons Joost A. M. Labout Bart van de Gaauw Michaël Kuiper Albertus Beishuizen Dennis Geutjes Johan Lutisan Bart Grady Remko van den Akker Tom A. Rijpstra Wim Boersma Daniël Pretorius Menno Beukema Bram Simons A. A. Rijkeboer Marcel Ariës Niels C. Gritters van den Oever Martijn van Tellingen Annemieke Dijkstra Rutger van Raalte Ali el Hassouni David Romero Guzman Sandjai Bhulai Dagmar M. Ouweneel Ronald H. Driessen Jan M. Peppink G. J. Zijlstra

For mechanically ventilated critically ill COVID-19 patients, prone positioning has quickly become an important treatment strategy, however, is labor intensive and comes with potential adverse effects. Therefore, identifying which intubated patients will benefit may help allocate resources. From the multi-center Dutch Data Warehouse of ICU from 25 hospitals, we selected all 3619 episodes in 1142 invasively patients. We excluded longer than 24 h. Berlin ARDS criteria were not formally...

10.1186/s13613-022-01070-0 article EN cc-by Annals of Intensive Care 2022-10-20

Remote Photoplethysmography (remote PPG) enables contactless monitoring of the cardiac rhythm using video cameras. Prior research has shown feasibility video-based atrial fibrillation (AF) and/or flutter (Aflutter) detection in some scenarios, but most exclude patient movement. In this work, we investigate detecting these two arrhythmias a regular hospital environment an RGB camera, where patients were not limited movement during recording process. Data 56 was collected before and after...

10.1117/12.2653550 article EN 2023-04-10
Lucas M. Fleuren Michele Tonutti Daan P. de Bruin Robbert C. A. Lalisang Tariq A. Dam and 95 more Diederik Gommers Olaf L. Cremer Rob J. Bosman Sebastiaan J. J. Vonk Mattia Fornasa Tomas Machado Nardo J. M. van der Meer Sander Rigter Evert‐Jan Wils Tim Frenzel Dave A. Dongelmans Remko de Jong Marco Peters Marlijn J. A. Kamps Dharmanand Ramnarain Ralph Nowitzky Fleur G. C. A. Nooteboom Wouter de Ruijter Louise C. Urlings‐Strop Ellen G. M. Smit D. Jannet Mehagnoul‐Schipper Tom Dormans Cornelis P. C. de Jager Stefaan H. A. Hendriks Evelien Oostdijk Auke C. Reidinga Barbara Festen‐Spanjer Gert B. Brunnekreef Alexander D. Cornet Walter van den Tempel Age D. Boelens Peter Koetsier Judith Lens Sefanja Achterberg Harald J. Faber Ali Karakuş Menno Beukema Robert Entjes Paul de Jong Taco Houwert Hidde Hovenkamp Roberto Noorduijn Londono Davide Quintarelli Martijn G. Scholtemeijer Aletta A. de Beer Giovanni Cinà Martijn Beudel N. F. de Keizer Mark Hoogendoorn Armand R. J. Girbes Willem E. Herter Paul Elbers Patrick Thoral Thijs C. D. Rettig Merijn C. Reuland Laura van Manen Leon J. Montenij Jasper van Bommel Roy van den Berg Ellen van Geest Anisa Hana Wim Boersma Bas van den Bogaard Peter Pickkers Pim van der Heiden Claudia C. W. van Gemeren Arend Jan Meinders Martha de Bruin Emma Rademaker Frits van Osch Martijn D. de Kruif Nicolas F. Schroten Klaas Sierk Arnold J. W. Fijen Jacomar J. M. van Koesveld Koen S. Simons Joost A. M. Labout Bart van de Gaauw Michaël Kuiper Albertus Beishuizen Dennis Geutjes Johan Lutisan Bart Grady Remko van den Akker Bram Simons A. A. Rijkeboer M. Sesmu Arbous Marcel Ariës Niels C. Gritters van den Oever Martijn van Tellingen Annemieke Dijkstra Rutger van Raalte Luca F. Roggeveen Fuda van Diggelen Ali el Hassouni

Abstract Background The identification of risk factors for adverse outcomes and prolonged intensive care unit (ICU) stay in COVID-19 patients is essential prognostication, determining treatment intensity, resource allocation. Previous studies have determined on admission only, included a limited number predictors. Therefore, using data from the highly granular multicenter Dutch Data Warehouse, we developed machine learning models to identify ICU mortality, ventilator-free days ICU-free...

10.1186/s40635-021-00397-5 article EN cc-by Intensive Care Medicine Experimental 2021-06-27

Point-of-care cardiovascular left ventricle ejection fraction (LVEF) quantification is established, but automatic tablet-based stroke volume (SV) with handheld ultrasound (HAND) devices unexplored. We evaluated a monoplane LVEF and LV tool (AutoEF) against computer-based (Tomtec) for SV quantification.

10.1111/echo.15904 article EN cc-by-nc-nd Echocardiography 2024-08-01

In this work, we investigated the feasibility of extracting continuous respiratory parameters from a single RGB camera stationed in short-stay ward. Based on extracted respiration parameters, further using features to aid detection atrial fibrillation (AF). To extract respiration, implemented two algorithms: chest optical flow (COF) and energy variance maximization (EVM). We used COF patient's thoracic area EVM facial area. Using capnography as reference, for average breath-to-breath rate...

10.1117/12.2653585 article EN 2023-04-10

The peak velocity variation within the carotid artery (ΔVpeakCCA) and left ventricular outflow tract (ΔVpeakLVOT) is derived from pulsed wave Doppler waveform may predict fluid responsiveness. aim of this study was to evaluate ΔVpeakCCA ΔVpeakLVOT against calibrated stroke volume (SVV) pulse pressure (PVV). Therefore, eighteen cardiac surgery patients were included in prospective observational study. measurements performed after induction anesthesia, a passive leg raise, at end surgery....

10.1016/j.wfumbo.2023.100001 article EN cc-by-nc-nd WFUMB Ultrasound Open 2023-04-15
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