SECOND AMENDMENT
                                TO LOAN AGREEMENT

         This Second  Amendment to Loan Agreement (the  "Amendment") is made and
entered  into  among  Merit  Medical  Systems,  Inc.  ("Merit  Medical"),  Merit
Holdings, Inc. ("Merit Holdings"), Sentir Semiconductor,  Inc. ("Sentir") (Merit
Medical,  Merit Holdings and Sentir are  collectively  called  "Borrowers")  and
Zions First National Bank ("Lender").

                                    Recitals

         1.  Borrowers  and Lender have entered in an Amended and Restated  Loan
Agreement dated August 11, 1999 (as previously amended, the "Agreement").

         2.  Borrowers  and Lender  desire to modify and amend the  Agreement as
provided herein.

                                    Amendment

         For good and valuable  consideration,  the receipt and  sufficiency  of
which are hereby  acknowledged,  Borrowers and Lender hereby agree and amend and
modify the Agreement as follows:

         1. Definitions.  Except as otherwise  expressly provided herein,  terms
assigned  defined meanings in the Agreement shall have the same defined meanings
in this Amendment.

         2. Amended  Definition.  The definition of "Facility Amount" in Section
1.1 of the Agreement is amended in its entirety to read as follows:

         "Facility Amount" means twenty-two million dollars  ($22,000,000.00) as
such  amount  is  reduced  by  three  hundred   seventy-five   thousand  dollars
($375,000.00) on the last day of each quarter commencing with the quarter ending
March 31, 2001.

         3. Conditions to Effectiveness  of Amendment.  The amendments set forth
above shall become  effective,  as of the date and year set forth below, on such
date (the "Second Amendment Effective Date") when the following conditions shall
have been satisfied in a form and substance acceptable to Lender:

                  a. This Amendment and all other documents contemplated by this
         Amendment  to be  delivered  to Lender prior to funding have been fully
         executed and delivered to Lender.

                  b. All other conditions  precedent provided in or contemplated
         by the Agreement,  the Security  Documents,  or any other  agreement or
         document have been performed.

                  c. As of the Second  Amendment  Effective  Date, the following
         shall be true and correct:  (1) all representations and warranties made
         by  Borrowers  in the  Agreement  are true and correct as of the Second
         Amendment  Effective  Date;  and (2) no Event of Default  has  occurred
         under the Agreement and no conditions  exist and no event has occurred,
         which, with the passage of time or the giving of notice, or both, would
         constitute an Event of Default under the Agreement.

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         All  conditions  precedent  set forth in the  Agreement,  the  Security
Documents, or in any other document relating thereto are for the sole benefit of
Lender and may be waived unilaterally by Lender.

         4.  Collateral.  The Loan and the  Promissory  Note are  secured by the
collateral identified in, and contemplated by the Agreement,  including, without
limitation, the various Security Agreements,  dated August 11, 1999, executed by
the Borrowers,  and by the Collateral described in Section 3.1 Collateral of the
Agreement.

         5.  Representations  and  Warranties.  Each Borrower hereby affirms and
again  makes  the   representations  and  warranties  set  forth  in  Article  5
Representations  and Warranties as of the Second Amendment  Effective Date. Each
Borrower  represents  and  warrants  that  there  have  been no  changes  to the
Organizational Documents of such Borrower since August 11, 1999.

         6. Authorization.  Borrower represents and warrants that the execution,
delivery,  and  performance by Borrowers of this  Amendment and all  agreements,
documents,  obligations,  and transactions  herein  contemplated  have been duly
authorized  by all  necessary  action on the part of such  Borrower  and are not
inconsistent with such Borrower's  Organizational Documents or any resolution of
the Board of  Directors of such  Borrower,  do not and will not  contravene  any
provision of, or constitute a default under, any indenture,  mortgage, contract,
or other  instrument  to which such Borrower is a party or by which it is bound,
and that upon  execution and delivery  hereof and thereof,  this  Amendment will
constitute  legal,  valid,  and  binding  agreements  and  obligations  of  each
Borrower, enforceable in accordance with their respective terms.

         7. Payment of Expenses and  Attorney's  Fees.  Borrowers  shall pay all
reasonable  expenses  of  Lender  relating  to  the  negotiation,   drafting  of
documents, and documentation of this Amendment,  including,  without limitation,
reasonable attorney's fees and legal expenses. If such expenses are not promptly
paid,  Lender is authorized  and directed,  upon execution of this Amendment and
fulfillment  of all  conditions  precedent  hereunder,  to disburse a sufficient
amount of the Loan proceeds to pay in full these expenses.

         8.  Agreement  Remains in Full Force and  Effect.  Except as  expressly
amended or modified by this Amendment,  the Agreement  remains in full force and
effect.

         9.  Counterpart  Execution.  This  Amendment may be executed in several
counterparts,  without the requirement  that all parties sign each  counterpart.
Each of such counterparts  shall be an original,  but all counterparts  together
shall constitute one and the same instrument.

         10. Integrated Agreement;  Amendment. This Amendment, together with the
Agreement,  the Promissory Note, Security  Documents,  and the other agreements,
documents,  obligations,  and transactions contemplated by the Agreement and the
Amendment,  constitute  the entire  agreements  and  understandings  between the
parties and supersede all other prior and contemporaneous agreements and may not

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be altered or amended except by written  agreement  signed by the parties.  This
Amendment  and the  Agreement  shall be read  and  interpreted  together  as one
agreement.  PURSUANT TO UTAH CODE SECTION  25-5-4,  BORROWERS  ARE NOTIFIED THAT
THESE  AGREEMENTS  ARE A FINAL  EXPRESSION OF THE AGREEMENT  BETWEEN  LENDER AND
BORROWERS  AND THESE  AGREEMENTS  MAY NOT BE  CONTRADICTED  BY  EVIDENCE  OF ANY
ALLEGED  ORAL  AGREEMENT.  All  other  prior  and  contemporaneous   agreements,
arrangements  and  understandings  between the parties  hereto as to the subject
matter hereof are, except as otherwise expressly provided herein, rescinded.

         Dated: March 5, 2001


                                     Lender:

                                     Zions First National Bank


                                     By:
                                        ----------------------------------------
                                     Title:
                                           -------------------------------------

                                     Borrowers:

                                     Merit Medical Systems, Inc.


                                     By: /s/: KENT W. STANGER
                                     ------------------------
                                              KENT W. STANGER
                                              Title: CFO

                                              Merit Holdings, Inc.


                                     By: /s/: KENT W. STANGER
                                     ------------------------
                                              KENT W. STANGER
                                              Title: CFO

                                              Sentir Semiconductor, Inc.


                                     By: /s/: KENT W. STANGER
                                     ------------------------
                                              KENT W. STANGER
                                              Title: CFO

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