title: [Monitor of ECG signal and heart rate using a mobile phone with Bluetooth communication protocol].
abstract: OBJECTIVE
  To develop a portable signal monitoring equipment for electrocardiography (ECG) and heart rate (HR), communicated with a mobile phone using the Bluetooth (BT) communication protocol for display of the signal on screen.
  
  
  METHODS
  A monitoring system was designed in which the electronic section performs the ECG signal acquisition, as well as amplification, filtering, analog to digital conversion and transmission of the ECG and HR using BT. Two programs were developed for the system. The first one calculates HR through QRS identification and sends the ECG signals and HR to the mobile, and the second program is an application to acquire and display them on the mobile screen.
  
  
  RESULTS
  We developed a portable electronic system powered by a 9 volt battery, with amplification and bandwidth meeting the international standards for ECG monitoring. The QRS complex identification was performed using the second derivative algorithm, while the programs allow sending and receiving information from the ECG and HR via BT, and viewing it on the mobile screen. The monitoring is feasible within distances of 15 m and it has been tested in various mobiles telephones of brands Nokia®, Sony Ericsson® and Samsung®.
  
  
  CONCLUSIONS
  This system shows an alternative for mobile monitoring using BT and Java 2 Micro Edition (J2ME) programming. It allows the register of the ECG trace and HR, and it can be implemented in different phones.
authors.affiliation: Departamento de Instrumentación Electromecánica, Instituto Nacional de Cardiología Ignacio Chávez, México D.F., México.
authors.forename: Brayans
authors.initials: B
authors.lastname: Becerra-Luna
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Dávila-García
authors.forename: Paola
authors.initials: P
authors.lastname: Salgado-Rodríguez
authors.forename: Raúl
authors.initials: R
authors.lastname: Martínez-Memije
authors.forename: Oscar
authors.initials: O
authors.lastname: Infante-Vázquez
mesh_terms: D040421:Cell Phone; D015716:Electrocardiography, Ambulatory / Q000295:instrumentation*; D006339:Heart Rate; D006801:Humans