```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>(t) Essential hyperAcute hyperkale@11:16:10</query_name>
    <query_timing>ANY</query_timing>
    <specificity_scale>0</specificity_scale>
    <subquery_constraint>
        <first_query>
            <query_id>Observation A</query_id>
            <join_column>STARTDATE</join_column>
            <aggregate_operator>FIRST</aggregate_operator>
        </first_query>
        <operator>LESS</operator>
        <second_query>
            <query_id>Observation B</query_id>
            <join_column>STARTDATE</join_column>
            <aggregate_operator>FIRST</aggregate_operator>
        </second_query>
    </subquery_constraint>
    <subquery>
        <query_id>Observation A</query_id>
        <query_type>EVENT</query_type>
        <query_name>Observation A</query_name>
        <query_timing>SAMEINSTANCENUM</query_timing>
        <specificity_scale>0</specificity_scale>
        <panel>
            <panel_number>0</panel_number>
            <panel_timing>SAMEINSTANCENUM</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>Essential hypertension</item_name>
                <item_key>\\i2b2_DIAG\i2b2\Diagnoses\Circulatory system (390-459)\Hypertensive disease (401-405)\(401) Essential hypertension\</item_key>
                <item_icon>FA</item_icon>
                <tooltip>Diagnoses \ Circulatory system \ Hypertensive disease \ Essential hypertension</tooltip>
                <class>ENC</class>
                <item_is_synonym>false</item_is_synonym>
            </item>
        </panel>
    </subquery>
    <subquery>
        <query_id>Observation B</query_id>
        <query_type>EVENT</query_type>
        <query_name>Observation B</query_name>
        <query_timing>SAMEINSTANCENUM</query_timing>
        <specificity_scale>0</specificity_scale>
        <panel>
            <panel_number>0</panel_number>
            <panel_timing>SAMEINSTANCENUM</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 hyperkalemia</item_name>
                <item_key>\\i2b2_DIAG\i2b2\Diagnoses\Metabolic and immunity disorders (270-279)\(276) Disorders of fluid, electro~\(276-7) Hyperpotassemia\</item_key>
                <item_icon>LA</item_icon>
                <tooltip>Diagnoses \ Metabolic and immunity disorders \ Disorders of fluid, electrolyte, and acid-base balance \ Hyperpotassemia</tooltip>
                <class>ENC</class>
                <item_is_synonym>true</item_is_synonym>
            </item>
            <item>
                <hlevel>4</hlevel>
                <item_name>Hyperkalemia</item_name>
                <item_key>\\i2b2_DIAG\i2b2\Diagnoses\Metabolic and immunity disorders (270-279)\(276) Disorders of fluid, electro~\(276-7) Hyperpotassemia\</item_key>
                <item_icon>LA</item_icon>
                <tooltip>Diagnoses \ Metabolic and immunity disorders \ Disorders of fluid, electrolyte, and acid-base balance \ Hyperpotassemia</tooltip>
                <class>ENC</class>
                <item_is_synonym>true</item_is_synonym>
            </item>
            <item>
                <hlevel>4</hlevel>
                <item_name>Chronic hyperkalemia</item_name>
                <item_key>\\i2b2_DIAG\i2b2\Diagnoses\Metabolic and immunity disorders (270-279)\(276) Disorders of fluid, electro~\(276-7) Hyperpotassemia\</item_key>
                <item_icon>LA</item_icon>
                <tooltip>Diagnoses \ Metabolic and immunity disorders \ Disorders of fluid, electrolyte, and acid-base balance \ Hyperpotassemia</tooltip>
                <class>ENC</class>
                <item_is_synonym>true</item_is_synonym>
            </item>
            <item>
                <hlevel>5</hlevel>
                <item_name>POTASSIUM (LOINC:2823-3)</item_name>
                <item_key>\\i2b2_LABS\i2b2\Labtests\LAB\(LLB16) Chemistry\(LLB22) Lytes/Renal/Glucose\K\LOINC:2823-3\</item_key>
                <item_icon>LA</item_icon>
                <tooltip>Labtests \ Chemistry \ Lytes/Renal/Glucose \ Potassium (Group:K) \ Potassium (LOINC:2823-3)</tooltip>
                <class>ENC</class>
                <constrain_by_value>
                    <value_operator>GE</value_operator>
                    <value_constraint>5</value_constraint>
                    <value_unit_of_measure>mmol/l</value_unit_of_measure>
                    <value_type>NUMBER</value_type>
                </constrain_by_value>
                <item_is_synonym>false</item_is_synonym>
            </item>
        </panel>
    </subquery>
</ns4:query_definition>

```

I want to find patients with a diagnosis of Essential hypertension in the same encounter as a diagnosis of acute or chronic hyperkalemia, or an abnormal lab result with a potassium level greater than or equal to 5 mmol/L, where the diagnosis of Essential hypertension occurs before the diagnosis of hyperkalemia or abnormal potassium lab result.