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    <element id="STXS_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsIncludingGoodwill" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsIncludingGoodwill" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_BusinessAcquisitionAdditionalEarnoutShares" name="BusinessAcquisitionAdditionalEarnoutShares" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_BusinessCombinationPerformanceObligationRegulatoryMilestonesPayableAmount" name="BusinessCombinationPerformanceObligationRegulatoryMilestonesPayableAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_BusinessCombinationPercentageOfMaximumVotingRightsToIssueCommonShares" name="BusinessCombinationPercentageOfMaximumVotingRightsToIssueCommonShares" nillable="true" xbrli:periodType="instant" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_EstimatedFairValueOfContingentConsiderationRelatedToAdditionalEarnoutShares" name="EstimatedFairValueOfContingentConsiderationRelatedToAdditionalEarnoutShares" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_BusinessCombinationConsiderationTransferredIncludingUpfrontPayment" name="BusinessCombinationConsiderationTransferredIncludingUpfrontPayment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_PrepaidCommissionsCurrentAndNoncurrent" name="PrepaidCommissionsCurrentAndNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_DeferredCostOfRevenue" name="DeferredCostOfRevenue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_OperatingLeaseRightOfUseAssetAndLiability" name="OperatingLeaseRightOfUseAssetAndLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_MarketCapitalizationMilestone" name="MarketCapitalizationMilestone" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceGranted" name="SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceGranted" nillable="true" xbrli:periodType="duration" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceExercised" name="SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceExercised" nillable="true" xbrli:periodType="duration" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceForfeited" name="SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceForfeited" nillable="true" xbrli:periodType="duration" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_CommissionPercentageBasedOnGrossProceedsFromSharesSold" name="CommissionPercentageBasedOnGrossProceedsFromSharesSold" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_AveragePriceOfGrossProceedsPrice" name="AveragePriceOfGrossProceedsPrice" nillable="true" xbrli:periodType="instant" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_ProceedsFromIssuanceCommonStock" name="ProceedsFromIssuanceCommonStock" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_SaleOfStockNumberOfSharesToBeIssuedInTransaction" name="SaleOfStockNumberOfSharesToBeIssuedInTransaction" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_SaleOfStockGrossConsiderationReceivedOnTransaction" name="SaleOfStockGrossConsiderationReceivedOnTransaction" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_PercentageOfCashFeeCompensation" name="PercentageOfCashFeeCompensation" nillable="true" xbrli:periodType="duration" type="xbrli:pureItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_PreferredStockStatedValuePerShare" name="PreferredStockStatedValuePerShare" nillable="true" xbrli:periodType="instant" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_PreferredStockRedemptionTriggeringEventPercentOfCommonStockSoldThreshold" name="PreferredStockRedemptionTriggeringEventPercentOfCommonStockSoldThreshold" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_IncreaseInMarketCapitalizationMilestone" name="IncreaseInMarketCapitalizationMilestone" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_MaximumPurchasePercentageOfEmployeesCompensation" name="MaximumPurchasePercentageOfEmployeesCompensation" nillable="true" xbrli:periodType="instant" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsChangesInU.s.FederalTaxValuationAllowance" name="EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsChangesInU.s.FederalTaxValuationAllowance" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_IncomeTaxReconciliationChangeInDeferredTaxAssetsFederalValuationAllowance" name="IncomeTaxReconciliationChangeInDeferredTaxAssetsFederalValuationAllowance" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_EffectiveIncomeTaxRateReconciliationNondeductibleExpensesAbstract" name="EffectiveIncomeTaxRateReconciliationNondeductibleExpensesAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_IncomeTaxReconciliationNondeductibleExpenses" name="IncomeTaxReconciliationNondeductibleExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_EffectiveIncomeTaxRateReconciliationNondeductibleExpensePerformanceShareUnitAward" name="EffectiveIncomeTaxRateReconciliationNondeductibleExpensePerformanceShareUnitAward" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_IncomeTaxReconciliationNondeductibleExpensePerformanceShareUnitAward" name="IncomeTaxReconciliationNondeductibleExpensePerformanceShareUnitAward" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_EffectiveIncomeTaxRateReconciliationContingentConsiderationPermanentDifference" name="EffectiveIncomeTaxRateReconciliationContingentConsiderationPermanentDifference" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_IncomeTaxRateReconciliationContingentConsiderationPermanentDifference" name="IncomeTaxRateReconciliationContingentConsiderationPermanentDifference" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_DeferredTaxAssetsTaxDeferredExpenseOperatingLeaseLiabilities" name="DeferredTaxAssetsTaxDeferredExpenseOperatingLeaseLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_DeferredTaxLiabilitiesOperatingLeaseRightofuseAssets" name="DeferredTaxLiabilitiesOperatingLeaseRightofuseAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_PercentageOfValuationAllowanceOfDeferredTaxAssets" name="PercentageOfValuationAllowanceOfDeferredTaxAssets" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_ScheduleOfConsolidatedStatementOfEarningTableTextBlock" name="ScheduleOfConsolidatedStatementOfEarningTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_EffectiveIncomeTaxRateReconciliationStateIncomeTaxExpenseBenefit" name="EffectiveIncomeTaxRateReconciliationStateIncomeTaxExpenseBenefit" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_IncomeTaxReconciliationStateRateAdjustments" name="IncomeTaxReconciliationStateRateAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="STXS_EffectiveIncomeTaxRateReconciliationNondeductibleExpenses" name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenses" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
</schema>
