EXHIBIT 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the annual report on Form 10-K of PLC Systems Inc. (the “Company”) for the period ended December 31, 2003 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, Mark R. Tauscher, Chief Executive Officer of the Company, hereby certifies, pursuant to 18 U.S.C. Section 1350, that:

(1)  the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)  the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated:	March 26, 2004	By:	/s/ Mark R. Tauscher
			Mark R. Tauscher
			Chief Executive Officer

In connection with the annual report on Form 10-K of PLC Systems Inc. (the “Company”) for the period ended December 31, 2003 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, James G. Thomasch, Chief Financial Officer of the Company, hereby certifies, pursuant to 18 U.S.C. Section 1350, that:

(1)  the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)  the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated:	March 26, 2004	By:	/s/ James G. Thomasch
			James G. Thomasch
			Chief Financial Officer