Exhibit 3.1 - Arrhythmia Research Technology, Inc. By-laws
AMENDED AND RESTATED BY-LAWS OF
ARRHYTHMIA RESEARCH TECHNOLOGY, INC.
November 11, 2002
1. Principal office. The principle office of the corporation in the State of Delaware shall be in the City of
Wilmington, County of New Castle.
2. Other offices. The corporation may also establish offices in other places, both within and without the State of
Delaware, as the Board of Directors may from time to time determine, or the business of the corporation may
3. Annual Meeting.
A. The annual meeting of the shareholders of the Company shall be held on such date in each year and at such
time and place as may be determined by the Board of Directors, for the purpose of electing Directors and for the
transaction of such other proper business as may come before the meeting. Should the shareholders fail to elect
Directors on the day designated for their annual meeting or before an adjournment thereof, the Board of
Directors shall call a special meeting of the shareholders as soon thereafter as practical.
B. Special meetings of the stockholders of the Corporation may be called by the Board of Directors or by the
Chairman to be held on such date as the Board or the Chairman shall determine. The Secretary shall call a special
meeting of the stockholders, to be held on such date as the Secretary shall determine, on the request in writing of
the holders of shares of capital stock of the Corporation entitled to vote at such meeting which represent a
majority of the total votes entitled to be cast at such meeting. Such notice shall set forth: (a) the action proposed
to be taken at the meeting and the reasons for the action; (b) the name and address of each of such holders who
intends to propose action to be taken at the meeting; (c) a representation that each is a holder of record of stock
of the Corporation entitled to vote at such meeting and intends to appear in person or by proxy at the