Micron Solutions (MICRD) 10-K 2007 FY Annual report

Exhibit 31.2

OFFICER’S CERTIFICATION

PURSUANT TO SECTION 302 OF

THE SARBANES-OXLEY ACT OF 2002

I, David A. Garrison certify that:

1.   I have reviewed this report on Form 10-K of Arrhythmia Research Technology, Inc. for the fiscal year ended December 31, 2007;

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 issuer as of, and for, the periods presented in this report;

4.   The issuer’s other certifying officer(s) 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 issuer 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 issuer, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.   designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under my supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.   evaluated the effectiveness of the issuer’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 our evaluation;

d.   disclosed in this report any change in the issuer’s internal controls over financial reporting that occurred during the issuer’s fourth fiscal quarter that has materially affected, or is reasonably likely to materially affect, the issuer’s internal controls over financial reporting; and

5.   The issuer’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the issuer’s auditors and the audit committee of the issuer’s board of directors (or persons performing the equivalent functions):

a.   All significant deficiencies in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the issuer’s ability to record, process, summarize and report financial information; and,

b.   Any fraud, whether or not material, that involves management or other employees who have a significant role in the issuer’s internal controls over financial reporting.

DATE: March 31, 2008	/s/ David A. Garrison
	David A. Garrison
	Executive Vice President and Chief Financial Officer