2009 News


PhysioNet/CinC Challenge 2010 training data

Prepare for the PhysioNet/Computers in Cardiology Challenge 2010, Mind the Gap! A set of training data is now available. The Challenge begins on 1 January.

Published: Dec. 1, 2009.


European ST-T Database expanded

The entire European ST-T Database, a landmark set of expert-annotated recordings for study of the ECG manifestation of myocardial ischemia and for development and evaluation of methods for quantifying ST and T changes in the ECG, is now available on PhysioNet. Roughly half of the database was previously contributed to PhysioNet in September, 2000; this new contribution makes the entire database available for free use by researchers for the first time.

Published: Nov. 27, 2009.


Seeking EMG and nerve conduction data

PhysioNet is seeking contributions of data from EMG and nerve conduction studies. The Margret and H.A. Rey Institute for Nonlinear Dynamics in Medicine has offered an annual award for the best such contribution.

Published: Sept. 29, 2009.


EEG Motor Movement/Imagery Dataset

A set of 64-channel EEGs from subjects who performed a series of motor/imagery tasks has been contributed to PhysioBank by the developers of the BCI2000 instrumentation system for brain-computer interface research.

Published: Sept. 9, 2009.


Is the Normal Heart Rate Chaotic?

In its issue of June 2009, Chaos has published a special section containing nine papers that address the question "Is the normal heart rate chaotic?". The discussion was initiated last year as a joint effort of Chaos and PhysioNet, which provided a collection of fifteen 20-24 hour RR interval time series derived from three PhysioBank ECG databases as a common focus for investigation of this question.

Published: July 7, 2009.


The MIMIC II Clinical Database (Public Subset)

We are pleased to announce that a limited distribution of the entire MIMIC II Clinical Database, containing data for over 26,000 subjects, has been contributed to PhysioBank and is now available to qualified researchers. Details are available here.

Published: May 5, 2009.


MIMIC II Waveform Database expanded

Over 1300 records have been added to the MIMIC II Waveform Database, bringing the total to over 4000 multi-parameter records from ICU patients, each typically several days in length, with many that are much longer. The new records include data from 249 neonatal ICU patients, a population not previously represented in PhysioBank. [Numbers of records have been corrected as of 30 July 2009.]

Published: April 27, 2009.


PhysioBank ATM

PhysioBank's Automated Teller Machine, a self-service facility for exploring PhysioBank using a web browser, is now on-line. Replacing the original PhysioBank web services introduced in 2000, the ATM offers a variety of tools for visualizing PhysioBank data and converting them to text, EDF, or .mat files, and more.

Published: March 16, 2009.


wfdb2mat: convert PhysioBank records to .mat format

The WFDB Software Package, versions 10.4.17 and later, includes wfdb2mat, a program that converts all or any desired portion of the signals in any PhysioBank or compatible record to a .mat file that can be read by Matlab or Octave. If the original signal files have not been downloaded from PhysioNet, <tt>wfdb2mat</tt> can read them directly from the PhysioNet server. The <tt>.mat</tt> files generated by <tt>wfdb2mat</tt> are also directly readable by dozens of other applications in the WFDB Software Package, including WAVE.

Published: March 5, 2009.


Using the MIMIC II Database

A few days ago, the first 60 patient records from the MIMIC II Clinical Database were posted, as part of the training set for our annual challenge (see the news item immediately below). A new tutorial, Using the MIMIC II Database, is now available to help challenge participants and others interested in this collection and in linking it with the recorded physiologic signals and time series of vital signs from the same patients in the MIMIC II Waveform Database.

Published: Feb. 4, 2009.


PhysioNet/CinC Challenge 2009

The 10th annual PhysioNet/Computers in Cardiology Challenge is underway. Participants are invited to identify which ICU patients are likely to experience sudden and severe drops in blood pressure. Successful prediction of these acute hypotensive events may lead to improved care and survival of patients at risk. The Challenge culminates in September with presentations by participants at a dedicated scientific session of Computers in Cardiology in Park City, Utah.

Published: Jan. 27, 2009.


Heart Rate Variability Analysis with the HRV Toolkit

Heart Rate Variability Analysis with the HRV Toolkit: Basic Time and Frequency Domain Measures is a new tutorial that describes how to use the HRV toolkit (an accompanying software package created for PhysioNet by Joe Mietus) to select and prepare time series of inter-beat intervals and to calculate measurements of the basic time- and frequency-domain HRV statistics that are widely used in the literature. Particular attention is given to techniques for identifying and dealing with outliers, in order to permit reliable determination of measurements.

Published: Jan. 26, 2009.