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Mathieu Lemay

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Publications associées (23)

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Predicting Acute Hypotensive Episodes

Jean-Marc Vesin, Mathieu Lemay, Florian Jousset

The goal of the challenge 2009 is to predict which patients will experience acute hypotensive episode (AHE) within a forecast window. AHE may result in dangerous complications and even death. Predicting the onset of AHE would be of clear benefit to a patie ...

2009

Non-invasive pulmonary artery pressure estimation by electrical impedance tomography in a controlled hypoxemia study in healthy subjects

Jean-Philippe Thiran, Mathieu Lemay, Fabian Braun, Martin Proença

Pulmonary hypertension is a hemodynamic disorder defined by an abnormal elevation of pulmonary artery pressure (PAP). Current options for measuring PAP are limited in clinical practice. The aim of this study was to evaluate if electrical impedance tomograp ...

NATURE RESEARCH2020

Activity Level of an Atrial Ectopic Focus Observed Through the Equivalent Dipole: a Biophysical Model

Jean-Marc Vesin, Vincent Jacquemet, Mathieu Lemay, Cédric Duchene

Quantifying the role of atrial ectopic foci in the initiation and the maintenance of atrial fibrillation (AF) is a relevant clinical problem. This study aims at assessing the relation between the activity level of an ectopic focus and the complexity of the ...

2009

Influence of heart motion on cardiac output estimation by means of electrical impedance tomography: a case study

Jean-Philippe Thiran, Mathieu Lemay, Fabian Braun, Martin Proença, Michaël Rapin

Electrical impedance tomography (EIT) is a non-invasive imaging technique that can measure cardiac-related intra-thoracic impedance changes. EIT-based cardiac output estimation relies on the assumption that the amplitude of the impedance change in the vent ...

Iop Publishing Ltd2015

Adaptive Multiple Frequency Tracking Algorithm: Detection of Stable Atrial Fibrillation Sources from Standard 12-Lead ECG

Jean-Marc Vesin, Vincent Jacquemet, Mathieu Lemay, Cédric Duchene

The detection of stable atrial fibrillation (AF) sources remains one of the major challenges in the AF management. In this study, we investigated the feasibility of detecting stable AF sources from (non invasive) data simulated by means of numerical proced ...

2009

The Respiration Pattern as an Indicator of the Anaerobic Threshold

Jean-Marc Vesin, Mathieu Lemay, Leila Mirmohamadsadeghi

The anaerobic threshold (AT) is a good index of personal endurance but needs a laboratory setting to be determined. It is important to develop easy AT field measurements techniques in order to rapidly adapt training programs. In the present study, it is po ...

2015

The Role of Atrial Modeling in the Development of ECG Processing Tools

Jean-Marc Vesin, Vincent Jacquemet, Mathieu Lemay, Lukas Kappenberger, Laurent Renaud Uldry, Cédric Duchene

The standard ECG remains the most common non-invasive tool for assessing atrial fibrillation. Specific signal processing techniques have been developed to improve the diagnosis. However, validation of such tools is challenging and comprehensive invasive da ...

2009

Ventricular and Atrial Activity Estimation Through Sparse ECG Signal Decompositions

Pierre Vandergheynst, Jean-Marc Vesin, Mathieu Lemay, Lorenzo Granai, Oscar Divorra Escoda

This paper explores a novel approach for ventricular and atrial activities estimation in electrocardiogram (ECG) signals, based on sparse source separation. Sparse decompositions of ECG over signal-adapted multi-component dictionaries can lead to natural s ...

2006

Noninvasive measurement of stroke volume changes in critically ill patients by means of electrical impedance tomography

Jean-Philippe Thiran, Mathieu Lemay, Fabian Braun, Martin Proença

Previous animal experiments have suggested that electrical impedance tomography (EIT) has the ability to noninvasively track changes in cardiac stroke volume (SV). The present study intended to reproduce these findings in patients during a fluid challenge. ...

SPRINGER HEIDELBERG2020

Full Spectral Analysis of the Atrial Components in the ECG during Atrial Fibrillation

Mathieu Lemay, Lukas Kappenberger

Clinical standard 12-lead ECG recordings over 5 minutes on patients in atrial fibrillation or in atrial flutter were analyzed. After suppression of the signal components related to ventricular activity, the amplitude spectra of all leads were inspected. Th ...

IEEE2008

Adaptive Frequency Tracking on the ECG Used to Predict the Success of Electrical Cardioversion of Atrial Fibrillation

Jean-Marc Vesin, Mathieu Lemay, Frank Grégoire Jean de Morsier, Yann Prudat

One of the rhythm control strategies in atrial fibrillation management consists in the application of a brief single electrical shock to the atria. This electrical cardioversion does not always succeed, and the long-term success of this therapy is not suff ...

IEEE2008

Data processing techniques for the characterization of atrial fibrillation

Mathieu Lemay

Atrial fibrillation is the most common sustained cardiac rhythm disturbance, increasing in prevalence with age. During the past 20 years, there has been a 66% increase in hospital admissions related to atrial fibrillation. Neither the natural history of at ...

EPFL2008

Can one detect atrial fibrillation using a wrist-type photoplethysmographic device?

Jean-Marc Vesin, Etienne Pruvot, Mathieu Lemay, Célestin Leupi, Sibylle Fallet, Philippe Renevey

This study aims at evaluating the potential of a wrist-type photoplethysmographic (PPG) device to discriminate between atrial fibrillation (AF) and other types of rhythm. Data from 17 patients undergoing catheter ablation of various arrhythmias were proces ...

SPRINGER HEIDELBERG2019

Estimation of Atrial Multiple Reentry Circuits from Surface ECG Signals based on a Vectorcardiogram Approach

Jean-Marc Vesin, Mathieu Lemay, Cédric Duchene

This paper presents a simulation study on the identifiability of multiple reentrant circuits on the basis of the vectorcardiogram. The methods involved include an advanced tracking of the basic frequencies of the dominant rotors and a supporting identifica ...

Spinger2009

Quasi-Periodic Atrial Activity Components in the ECG Used to Discriminate between Paroxysmal and Chronic Atrial Fibrillation

Jean-Marc Vesin, Mathieu Lemay, Lam Dang

IEEE2008

Computers in Cardiology / Physionet Challenge 2009: Predicting Acute Hypotensive Episodes

Jean-Marc Vesin, Mathieu Lemay, Florian Jousset

The goal of the Computers in Cardiology / Physionet Challenge 2009 is to predict which patients will experience acute hypotensive episode within a forecast window of one hour. In our study, statistically robust features extracted from the supplied training ...

2009

Adaptive Multiple Frequency Tracking Algorithm used to Detect Stable Atrial Fibrillation Sources from standard 12-lead ECG

Jean-Marc Vesin, Mathieu Lemay, Cédric Duchene

2009

Mathieu Lemay

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Predicting Acute Hypotensive Episodes

Non-invasive pulmonary artery pressure estimation by electrical impedance tomography in a controlled hypoxemia study in healthy subjects

Activity Level of an Atrial Ectopic Focus Observed Through the Equivalent Dipole: a Biophysical Model

Influence of heart motion on cardiac output estimation by means of electrical impedance tomography: a case study

Adaptive Multiple Frequency Tracking Algorithm: Detection of Stable Atrial Fibrillation Sources from Standard 12-Lead ECG

The Respiration Pattern as an Indicator of the Anaerobic Threshold

The Role of Atrial Modeling in the Development of ECG Processing Tools

Ventricular and Atrial Activity Estimation Through Sparse ECG Signal Decompositions

Noninvasive measurement of stroke volume changes in critically ill patients by means of electrical impedance tomography

Full Spectral Analysis of the Atrial Components in the ECG during Atrial Fibrillation

Adaptive Frequency Tracking on the ECG Used to Predict the Success of Electrical Cardioversion of Atrial Fibrillation

Data processing techniques for the characterization of atrial fibrillation

Can one detect atrial fibrillation using a wrist-type photoplethysmographic device?

Estimation of Atrial Multiple Reentry Circuits from Surface ECG Signals based on a Vectorcardiogram Approach

Quasi-Periodic Atrial Activity Components in the ECG Used to Discriminate between Paroxysmal and Chronic Atrial Fibrillation

Computers in Cardiology / Physionet Challenge 2009: Predicting Acute Hypotensive Episodes

The hidden organization of atrial fibrillation

Cancellation of Ventricular Activity in the ECG: Evaluation of novel and existing methods

Spectral analysis of the ECG identifies dominant rotors during atrial fibrillation

Adaptive Multiple Frequency Tracking Algorithm used to Detect Stable Atrial Fibrillation Sources from standard 12-lead ECG