EXHIBIT 23.1

               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

         We consent to the reference to our firm under the caption "Experts" in
the Registration Statement (Form S-3) and related Prospectus of Cardima, Inc.
for the registration of 4,515,953 shares of its common stock and to the
incorporation by reference therein of our report dated January 31, 2001, with
respect to the financial statements of Cardima, Inc. included in its Annual
Report (Form 10-K) for the year ended December 31, 2000, filed with the
Securities and Exchange Commission.

                                                      /s/ ERNST & YOUNG LLP

Palo Alto, California

October 11, 2001