Publications by Srinivasan Murali

Performance of the new SmartCardia wireless, wearable oximeter: a comparison with arterial SaO2 in healthy volunteers

Srinivasan Murali, Francisco Javier Rincon Vallejos, Julien Pidoux

Background Our goal was to evaluate the performance of a new wearable arm located pulse oximeter. Methods Twelve volunteers were monitored with three pulse oximeters and underwent desaturation to 70% SaO(2). We compared the accuracy of SpO(2) reading from ...

BMC2022

Cardiac Ambulatory Monitoring: New Wireless Device Validated Against Conventional Holter Monitoring in a Case Series

Srinivasan Murali, Francisco Javier Rincon Vallejos

Background: Cardiac arrhythmias are very common but underdiagnosed due to their transient and asymptomatic nature. An optimization of arrhythmia detection would permit to better treat patients and could substantially reduce morbidity and mortality. The Sma ...

FRONTIERS MEDIA SA2020

Online Obstructive Sleep Apnea Detection on Medical Wearable Sensors

David Atienza Alonso, Srinivasan Murali, Francisco Javier Rincon Vallejos, Amir Aminifar, Grégoire Casimir Joseph Surrel

Obstructive Sleep Apnea (OSA) is one of the main under-diagnosed sleep disorder. It is an aggravating factor for several serious cardiovascular diseases, including stroke. There is, however, a lack of medical devices for long-term ambulatory monitoring of ...

2018

Method and Device for Non-Invasive Blood Pressure Measurement

David Atienza Alonso, Srinivasan Murali, Francisco Javier Rincon Vallejos, Alair Dias Junior

A system for measuring blood pressure of a user that comprises an ElectroCardioGram (ECG) circuit with at least two ECG electrodes configured to obtain an electrical activity of a heart of the user by measuring the electrical signals detected at the at lea ...

2017

Ultra-Low Power Estimation of Heart Rate Under Physical Activity Using a Wearable Photoplethysmographic System

David Atienza Alonso, Srinivasan Murali, Francisco Javier Rincon Vallejos, Elisabetta De Giovanni

In the last years, the need for enhancing health and preventing problems with remote monitoring is increasing. A non-invasive low-cost technique for processing bio-signals and monitoring vital parameters, at rest and during physical activity, is the use of ...

IEEE Press2016

Touch-Based System for Beat-to-Beat Impedance Cardiogram Acquisition and Hemodynamic Parameters Estimation

David Atienza Alonso, Srinivasan Murali, Francisco Javier Rincon Vallejos, Dionisije Sopic

Among all cardiovascular diseases, congestive heart failure (CHF) has a very high rate of hospitalization and mortality. In order to prevent hospitalization, there is a strong need to identify patients at risk of a CHF event by estimating a set of relevant ...

IEEE/ACM Press2016

Methods for reliable estimation of pulse transit time and blood pressure variations using smartphone sensors

David Atienza Alonso, Srinivasan Murali, Francisco Javier Rincon Vallejos, Alair Dias Junior

Hypertension is known to affect around one third of adults globally and early diagnosis is essential to reduce the effects of this affliction. Today’s Blood Pressure (BP) monitoring cuffs are obtrusive and in- convenient for performing regular measurements ...

Elsevier Science Bv2016

Real-Time Probabilistic Heart Beat Classification and Correction for Embedded Systems

David Atienza Alonso, Srinivasan Murali, Francisco Javier Rincon Vallejos, Grégoire Casimir Joseph Surrel

With the emergence of wearable and non-intrusive med- ical devices, one major challenge is the real-time analysis of the acquired signals in real-life and ambulatory con- ditions. This paper presents a lightweight algorithm for on-line heart beat classific ...

2015

Energy-Aware Embedded Classifier Design for Real-Time Emotion Analysis

David Atienza Alonso, Srinivasan Murali, Francisco Javier Rincon Vallejos, Manoj Padmanabhan

Detection and classification of human emotions from multiple bio-signals has a wide variety of applications. Though electronic devices are available in the market today that acquire multiple body signals, the classification of human emotions in real-time, ...

IEEE Press2015

Method for detecting abnormalities in an electrocardiogram

David Atienza Alonso, Srinivasan Murali, Francisco Javier Rincon Vallejos, Ruben Braojos Lopez, Giovanni Ansaloni

A method for classification of ECG beats into normal and different categories of abnormal beats. The method comprises the following steps, performed on a computing platform: a. performing a training phase comprising taking as an input one or more ECG beats ...

2015

Method and apparatus for low complexity spectral analysis of bio-signals

David Atienza Alonso, Srinivasan Murali, Andreas Peter Burg, Aviinaash Sankaranarayanan, Georgios Karakonstantis

A method and device for reducing the computational complexity of a processing algorithm, of a discrete signal, in particular of the spectral estimation and analysis of bio-signals, with minimum or no quality loss, which comprises steps of (a) choosing a do ...

2015

A Wearable Device For Physical and Emotional Health Monitoring

David Atienza Alonso, Srinivasan Murali, Francisco Javier Rincon Vallejos

Personal health monitoring systems are emerging as promising solutions to develop ultra-small, portable devices that can continuously monitor and process several vital body parameters. In this work, we present a wearable device for physical and emotional h ...

2015

Estimation of Blood Pressure and Pulse Transit Time Using Your Smartphone

David Atienza Alonso, Srinivasan Murali, Francisco Javier Rincon Vallejos, Alair Dias Junior

It is widely recognized today that there is an alarming rise of lifestyle-induced chronic diseases (e.g., type II diabetes) in our society. Therefore, a strong need exists for cost-effective and non-invasive devices that can measure blood pressure (BP) to ...

IEEE Computer Society Press2015

Ultra-Low Power Design of Wearable Cardiac Monitoring Systems

David Atienza Alonso, Srinivasan Murali, Francisco Javier Rincon Vallejos, Hossein Mamaghanian, Ruben Braojos Lopez, Giovanni Ansaloni, Alair Dias Junior

This paper presents the system-level architecture of novel ultra-low power wireless body sensor nodes (WBSNs) for real-time cardiac monitoring and analysis, and discusses the main design challenges of this new generation of medical devices. In particular, ...

IEEE2014

Ultra-Low Power Design of Wearable Cardiac Monitoring Systems

David Atienza Alonso, Srinivasan Murali, Francisco Javier Rincon Vallejos, Hossein Mamaghanian, Ruben Braojos Lopez, Giovanni Ansaloni, Alair Dias Junior

This paper presents the system-level architecture of novel ultra-low power wireless body sensor nodes (WBSNs) for real-time cardiac monitoring and analysis, and discusses the main design challenges of this new generation of medical devices. In particular, ...

IEEE/ACM Press2014

Designing Best Effort Networks-on-Chip to Meet Hard Latency Constraints

Giovanni De Micheli, Luca Benini, Srinivasan Murali, Ciprian Seiculescu, Dara Rahmati, Hamid Sarbazi-Azad

Many classes of applications require Quality of Service (QoS) guarantees from the system interconnect. In Networks-on-Chip (NoC) QoS guarantees usually translate into bandwidth and latency constraints for the traffic flows and require hardware support in t ...

Assoc Computing Machinery2013

Computing Accurate Performance Bounds for Best Effort Networks-on-Chip

Giovanni De Micheli, Federico Angiolini, Luca Benini, Srinivasan Murali, Dara Rahmati, Hamid Sarbazi-Azad

Real-time (RT) communication support is a critical requirement for many complex embedded applications which are currently targeted to Network-on-chip (NoC) platforms. In this paper, we present novel methods to efficiently calculate worst- case bandwidth an ...

Institute of Electrical and Electronics Engineers2013

SunFloor 3D: A Tool for Networks on Chip Topology Synthesis for 3D Systems on Chips

Giovanni De Micheli, Luca Benini, Srinivasan Murali, Ciprian Seiculescu

Three-dimensional integrated circuits (3D-ICs) are a promising approach to address the integration challenges faced by current systems on chips (SoCs). Designing an efficient network on chip (NoC) interconnect for a 3-D SoC that meets not only the applicat ...

2010

Networks on Chips: From Research to Products

Giovanni De Micheli, Federico Angiolini, Luca Benini, Srinivasan Murali, Ciprian Seiculescu

Research on Networks on Chips (NoCs) has spanned over a decade and its results are now visible in some products. Thus the seminal idea of using networking technology to address the chip-level interconnect problem has been shown to be correct. Moreover, as ...

2010

A Method to Remove Deadlocks in Networks-on-Chips with Wormhole Flow Control

Giovanni De Micheli, Luca Benini, Srinivasan Murali, Ciprian Seiculescu

Networks-on-Chip (NoCs) are a promising interconnect paradigm to address the communication bottleneck of Systems-on-Chip (SoCs). Wormhole flow control is widely used as the transmission protocol in NoCs, as it offers high throughput and low latency. To mat ...

2010