EXHIBIT 23.1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in the Registration Statement on Form S-8 (No. 33-71568) of our report dated June 29, 2005 relating to the financial statements and schedule of the Arrow International, Inc. 401(k) Plan included in this Annual Report (Form 11-K) for the year ended December 31, 2004. /s/ BEARD MILLER COMPANY LLP Reading, Pennsylvania June 29, 2005 12