<SEC-DOCUMENT>0000899243-23-009454.txt : 20230322
<SEC-HEADER>0000899243-23-009454.hdr.sgml : 20230322
<ACCEPTANCE-DATETIME>20230322195639
ACCESSION NUMBER:		0000899243-23-009454
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20230320
FILED AS OF DATE:		20230322
DATE AS OF CHANGE:		20230322

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Wells David R.
		CENTRAL INDEX KEY:			0001480371

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-41422
		FILM NUMBER:		23754191

	MAIL ADDRESS:	
		STREET 1:		2801 OCEAN PARK BLVD.
		STREET 2:		SUITE 339
		CITY:			SANTA MONICA
		STATE:			CA
		ZIP:			90405

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Heart Test Laboratories, Inc.
		CENTRAL INDEX KEY:			0001468492
		STANDARD INDUSTRIAL CLASSIFICATION:	ORTHOPEDIC, PROSTHETIC & SURGICAL APPLIANCES & SUPPLIES [3842]
		IRS NUMBER:				261344466
		STATE OF INCORPORATION:			TX
		FISCAL YEAR END:			0430

	BUSINESS ADDRESS:	
		STREET 1:		550 RESERVE ST, SUITE 360
		CITY:			SOUTHLAKE
		STATE:			TX
		ZIP:			76092
		BUSINESS PHONE:		682-237-7781

	MAIL ADDRESS:	
		STREET 1:		550 RESERVE ST, SUITE 360
		CITY:			SOUTHLAKE
		STATE:			TX
		ZIP:			76092
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0407</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2023-03-20</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001468492</issuerCik>
        <issuerName>Heart Test Laboratories, Inc.</issuerName>
        <issuerTradingSymbol>HSCS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001480371</rptOwnerCik>
            <rptOwnerName>Wells David R.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O HEART TEST LABORATORIES, INC.,</rptOwnerStreet1>
            <rptOwnerStreet2>550 RESERVE STREET, SUITE 360</rptOwnerStreet2>
            <rptOwnerCity>SOUTHLAKE</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>76092</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Director Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.97</value>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2023-03-20</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>50000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2033-03-20</value>
                <footnoteId id="F3"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>50000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>50000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">These options were granted to the Reporting Person effective as of March 20, 2023 (the &quot;Effective Date&quot;), pursuant to the approval of the Issuer's board of directors (the &quot;Board&quot;) on March 20, 2023.</footnote>
        <footnote id="F2">The options shall vest in four equal increments, with the first tranche of the options vesting on June 20, 2023 (the &quot;Initial Vesting Date&quot;), with an additional one-fourth of the options vesting on each successive three-month anniversary of the Initial Vesting Date, subject to the Reporting Person's continued service on the Board through each applicable vesting date and subject to the terms of the Issuer's 2023 Equity Incentive Plan (the &quot;2023 Plan&quot;).</footnote>
        <footnote id="F3">These options expire ten years from the Effective Date, unless terminated sooner in accordance with the 2023 Plan or the underlying options grant agreement.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Andrew Simpson, Attorney-In-Fact</signatureName>
        <signatureDate>2023-03-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
