 Class conversion for heartbeat annotations.</p>
<blockquote>
<div>In case the annotations includes heartbeat types, this property indicates the class-labeling convention used.
The <a class="reference external" href="http://marketplace.aami.org/eseries/scriptcontent/docs/Preview%20Files/EC57_1212_preview.pdf">EC-57 AAMI recommendation</a> is de default value.
The possible values are <code class="docutils literal"><span class="pre">'AAMI'</span></code> or <code class="docutils literal"><span class="pre">AAMI