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<title>Challenge 2011 Training Set A</title>
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<center><h1>Challenge 2011 Training Set A</h1></center>
<p>
This is a collection of 1000 twelve-lead ECGs, each 10 seconds long, to be used
as a <em>training set</em> for the <a href=/challenge/2011/>PhysioNet/Computers
in Cardiology Challenge 2011</a>. The challenge entails determining which of
the similar records in the <em>test sets</em> are acceptable for
interpretation, and which are not.
<p>
<b>Reference classifications:</b> A preliminary set of classifications for this
training set is available; records listed
in <a href="RECORDS-acceptable">RECORDS-acceptable</a> are considered on the
basis of currently available information to be acceptable for classification,
and those listed in <a href="RECORDS-unacceptable">RECORDS-unacceptable</a> are
not. These preliminary classifications may be revised.
<p>
<b>File format:</b> The <tt>.hea</tt> files are short text files that specify
the format of the binary <tt>.dat</tt> signal files. The formats are those
used elsewhere on PhysioNet; see the <a href="/faq.shtml#signals">FAQ</a>
for details. Note that the last line of each <tt>.hea</tt> file indicates the
age and gender of the subject if known (unknown ages are recorded as 0, and
ages over 89 are recorded as 90). No other information is available about the
subjects of these recordings.
<p>
Download individual files from the list below, or download the entire
dataset as a tarball (<a href="../set-a.tar.gz">set-a.tar.gz</a>,
about 46 MB). See the <a href="/faq.shtml#tar-gz">FAQ</a> if you are
not familiar with unpacking tarballs.
<p>
For additional information, see the <a href="/challenge/2011/">Challenge
2011 home page</a>.