**Exhibit
31.1**
 
 **CERTIFICATIONS**
 
 I,
Raymond Cohen, Chief Executive Officer of Cardiac Science, Inc. (the
“registrant”), certify that:
 
 1.
    I have reviewed this quarterly report on Form
      10-Q for the quarterly period ended March 31, 2005;2.
    Based on my knowledge, this report does not contain any untrue
      statement of a material fact or omit to state a material fact necessary to
      make the statements made, in light of the circumstances under which such
      statements were made, not misleading with respect to the period covered by
      this report;3.
    Based on my knowledge, the financial
      statements, and other financial information included in this report,
      fairly present in all material respects the financial condition, results
      of operations and cash flows of the registrant as of, and for, the periods
      presented in this quarterly report;4.
    The registrant’s other certifying officer and
      I are responsible for establishing and maintaining disclosure controls and
      procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15 (e)) and
      internal control over financial reporting (as defined in Exchange Act
      Rules 13a-15(f) and 15d-15(f)) for the registrant and
have:
  a)
    designed
      such disclosure controls and procedures, or caused such disclosure
      controls and procedures to be designed under our supervision, to ensure
      that material information relating to the registrant, including its
      consolidated subsidiaries, is made known to us by others within those
      entities, particularly during the period in which this quarterly report is
      being prepared;b)
    designed
      such internal control over financial reporting, or caused such internal
      control over financial reporting to be designed under our supervision, to
      provide reasonable assurance regarding the reliability of financial
      reporting and the preparation of financial statements for external
      reporting purposes in accordance with generally accepted accounting
      principals;c)
    evaluated the effectiveness of the registrant’s disclosure controls
      and procedures and presented in this report our conclusions about the
      effectiveness of the disclosure controls and procedures, as of the end of
      the period covered by this report based on such evaluation;
      andd)
    disclosed in this report any change in the
      registrant’s internal control over financial reporting that occurred
      during the registrant’s most recent fiscal quarter (the registrant’s
      fourth fiscal quarter in the case of an annual report) that has materially
      affected, or is reasonably likely to materially affect, the registrant’s
      internal control over financial reporting; and5.
    The
      registrant’s other certifying officer(s) and I have disclosed, based on
      our most recent evaluation of internal control over financial reporting,
      to the registrant’s auditors and the audit committee of the registrant’s
      board of directors (or persons performing the equivalent
      function):a)
    all
      significant deficiencies and material weaknesses in the design or
      operation of internal controls which could adversely affect the
      registrant’s ability to record, process, summarize and report financial
      data and have identified for the registrant’s auditors any material
      weaknesses in internal controls; andb)
    any fraud, whether or not material, that
      involves management or other employees who have a significant role in the
      registrant’s internal control over financial reporting.
  Date:
      May 10, 2005
    /s/     RAYMONDW.
      COHEN**Raymond
      W. Cohen****Chief
      Executive Officer**