```xml
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ns4:query_definition xmlns:ns2="http://www.i2b2.org/xsd/cell/crc/psm/1.1/" xmlns:ns4="http://www.i2b2.org/xsd/cell/crc/psm/querydefinition/1.1/" xmlns:ns3="http://www.i2b2.org/xsd/cell/crc/psm/analysisdefinition/1.1/">
    <query_name>Acute myocardia@09:43:36</query_name>
    <query_timing>ANY</query_timing>
    <specificity_scale>0</specificity_scale>
    <panel>
        <panel_number>1</panel_number>
        <panel_timing>ANY</panel_timing>
        <panel_accuracy_scale>100</panel_accuracy_scale>
        <invert>0</invert>
        <total_item_occurrences>1</total_item_occurrences>
        <item>
            <hlevel>4</hlevel>
            <item_name>Acute myocardial infarction</item_name>
            <item_key>\\i2b2_DIAG\i2b2\Diagnoses\Circulatory system (390-459)\Ischemic heart disease (410-414)\(410) Acute myocardial infarction\</item_key>
            <item_icon>FA</item_icon>
            <tooltip>Diagnoses \ Circulatory system \ Ischemic heart disease \ Acute myocardial infarction</tooltip>
            <class>ENC</class>
            <item_is_synonym>false</item_is_synonym>
        </item>
    </panel>
</ns4:query_definition>

```

I want to find all patients with a diagnosis of acute myocardial infarction (heart attack) in the i2b2 database, using the specific category of (410) Acute myocardial infarction within the Circulatory system (390-459) and Ischemic heart disease (410-414) classifications, with a specificity scale of 0 and a total item occurrence of 1. The query timing is set to ANY, indicating that it should search for all instances of this diagnosis regardless of when it was recorded, and the accuracy scale is set to 100, indicating high confidence in the results. The panel number is 1, and the panel timing is also set to ANY, meaning that all panels will be searched for this diagnosis. The query is not inverted, and the class is set to ENC (Encounter).