How a get the rowIndex to pass as parameter on the example bellow?

<ext:CommandColumn runat="server" Align="Center">
    <Commands>
        <ext:GridCommand ToolTip-Text="Editar" Icon="NoteEdit" CommandName="Edit" />
        <ext:GridCommand ToolTip-Text="Excluir" Icon="Delete" CommandName="Delete" />
    </Commands>
    <DirectEvents>
        <Command OnEvent="grpTratamentos_Command">
            <Confirmation Title="Exclusão de procedimento" Message="Tem certeza que deseja excluir o procedimento selecionado?" BeforeConfirm="if (command!='Delete') return false;" ConfirmRequest="true" />
            <ExtraParams>
                <ext:Parameter Name="command" Value="command" Mode="Raw" />
                <ext:Parameter Name="codPacienteProcedimento" Value="record.data.CN_Paciente_Procedimento" Mode="Raw" />
                <ext:Parameter Name="idRowClicked" Value="rowIndex" Mode="Raw" />
            </ExtraParams>
        </Command>
    </DirectEvents>
</ext:CommandColumn>