Document:

Exhibit 4.5

 

HEARTBEAM, INC.

 

AMENDMENT TO CONVERTIBLE PROMISSORY
NOTES

 

This Amendment to Convertible Promissory Notes,
dated as of March 2, 2017, (the “Amendment”), is entered into by and among HeartBeam, Inc. (the “Company”)
and certain holders of convertible promissory notes issued by the Company (the “Investors”). Capitalized terms not
defined herein shall have the terms ascribed to them in the Subscription Agreements (as defined below) or the Notes (as defined below).

 

RECITALS

 

A.
The Company and the Investors are parties to certain 2015 Note Subscription Agreements (each, a “Subscription Agreement”
and together, the “Subscription Agreements”), each by and between the Company and the Investor set forth on the signature
page thereto.

 

B.
The Company sold and issued, and the Investors purchased convertible promissory notes in the aggregate principal amount of approximately
$2,000,000 (each, a “Note” and together, the “Notes”), pursuant to the Subscription Agreements.

 

C.
Pursuant to Section 6(b) of the Notes, any provision of a Note may be amended, waived or modified upon the written consent of the
Company and a Majority in Interest of Investors.

 

D.
The undersigned Investors represent a Majority in Interest of Investors.

 

E.
The Company and the Investors wish to amend the Notes to adjust the interest rate and maturity date of each of the Notes.

 

AGREEMENT

 

NOW THEREFORE, in consideration of the foregoing,
and the representations, warranties, and conditions set forth below, the parties hereto, intending to be legally bound, hereby agree as
follows:

 

1.
Amendment to Maturity Date. Effective as of the date hereof, the reference to “the twenty-four (24) month anniversary
of the first sale and issuance of any convertible promissory note pursuant to any 2015 Note Subscription Agreement following written demand
by a Majority in Interest of the Investors,” as the “Maturity Date” in the introductory paragraph of the Notes and the
form of Note attached to the Subscription Agreement shall be amended, restated and replaced to read “March 31, 2018”.

 

     

     

    

 

2.
Miscellaneous.

 

(a)
Amendment. This Amendment may not be amended, waived, discharged or terminated other than by a written instrument referencing
this Amendment and signed by the Company and the Investors representing a Majority in Interest of Investors.

 

(b) Governing Law. This Amendment and all
actions arising out of or in connection with this Agreement shall be governed by and construed in accordance with the laws of the State
of California, without regard to the conflicts of law provisions of the State of California or of any other state.

 

(c)
Entire Agreement. This Amendment, the Notes (to the extent not hereby amended) and the Subscription Agreements, including
the exhibits attached thereto, constitute the full and entire understanding and agreement between the parties for the subjects hereof
and thereof. No party shall be liable or bound to any other party in any manner for the subjects hereof or thereof by any warranties,
representations or covenants except as specifically set forth herein or therein.

 

(d) Severability. If any provision of this
Amendment becomes or is declared by a court of competent jurisdiction to be illegal, unenforceable or void, portions of such provision,
or such provision in its entirety, to the extent necessary, shall be severed from this Amendment, and such court will replace such illegal,
void or unenforceable provision of this Amendment with a valid and enforceable provision that will achieve, to the extent possible, the
same economic, business and other purposes of the illegal, void or unenforceable provision. The balance of this Amendment shall be enforceable
in accordance with its terms.

 

(e)
Counterparts. This Amendment may be executed in one or more counterparts, each of which will be deemed an original, but
all of which together will constitute one and the same agreement. Facsimile copies of signed signature pages will be deemed binding originals.

 

(signature page follows)

 

    -2-

     

    

 

IN WITNESS WHEREOF, this Amendment has been
entered into as of the date first set forth above.

 

	 	COMPANY:
	 	 
	 	HEARTBEAM, INC.
	 	a Delaware corporation
	 	 	 
	 	By:	/s/ Richard Brounstein
	 	Name: 	 Richard Brounstein
	 	Title: 	CFO

 

HeartBeam, Inc.

Amendment to Convertible Promissory Notes

 

 

    -3-

     

    

 

IN WITNESS WHEREOF, this Amendment has been
entered into as of the date first set forth above.

 

	 	INVESTOR:
	 	 
	 	By:	 /s/ Wim Elfrink

 

	 	Print Signatory Name:	 Wim Elfrink

 

	 	Investor Name:	WPE Ventures Partnership
	 	 	(applicable if stockholder is an entity)

 

	 	Title:	President
	 	 	(applicable if stockholder is an entity)

 

	 	INVESTOR:
	 	 
	 	By:	 /s/ William A. Lanfri

 

	 	Print Signatory Name:	William A Lanfri

 

	 	Investor Name:	Pont Holdings, LLC
	 	 	(applicable if stockholder is an entity)

 

	 	Title: 	Manager
	 	 	(applicable if stockholder is an entity)

 

HeartBeam, Inc.

Amendment to Convertible Promissory Notes

 

    -4-

     

    

 

IN WITNESS WHEREOF, this Amendment has been
entered into as of the date first set forth above.

 

	 	INVESTOR:
	 	 
	 	By:	/s/ Stephen P. Mullaney

 

	 	Print Signatory Name:	Stephen P. Mullaney

 

	 	Investor Name:	The Mullaney Family Trust dated December 13, 1994, as amended
	 	 	(applicable if stockholder is an entity)

 

	 	Title: 	Trustee
	 	 	(applicable if stockholder is an entity)

 

	 	INVESTOR:
	 	 	 
	 	By: 	/s/ Williem Pieter Elfrink 

 

	 	Print Signatory Name:	Willem Pieter Elfrink

 

	 	Investor Name:	 Elfrink Living Trust
	 	 	(applicable if stockholder is an entity)

 

	 	Title: 	Trustee
	 	 	(applicable if stockholder is an entity)

 

	 	INVESTOR:
	 	 	 
	 	By: 	Branislav Vajdic

 

	 	Print Signatory Name: 	/s/ Branislav Vajdic

 

HeartBeam, Inc.

Amendment to Convertible Promissory Notes

 

 

-5-Exhibit 4.6

 

HEARTBEAM, INC.

 

 

 

Action
By Unanimous Written Consent

of
the Board of Directors

 

 

 

Pursuant to Section 141(f)
of the Delaware General Corporation Law and the bylaws of HeartBeam, Inc., a Delaware corporation (the “Company”),
the undersigned, constituting all the members of the board of directors of the Company (the “Board”), resolve as follows:

 

		1.	Amendment of 2015 Notes and Note Subscription Agreements

 

		●	The
                                            Company and certain investors (the “Investors”) are parties to certain
                                            2015 Note Subscription Agreements (each, a “Subscription Agreement” and
                                            together, the “Subscription Agreements”), each by and between the Company
                                            and the Investor set forth on the signature page thereto.

 

		●	The Company sold and issued, and the Investors purchased convertible promissory notes in the aggregate
principal amount of approximately $2,000,000 (each, a “Note” and together, the “Notes”), pursuant
to the Subscription Agreements.

 

		●	The Board deems it advisable, and in the best interests of the Company and its shareholders, to amend
the Subscription Agreements pursuant to an Amendment No. 3 to 2015 Note Subscription Agreements in substantially the form attached hereto
as Exhibit A (the “Subscription Amendment”), whereby, among other things, the aggregate principal amount of all Notes
available for sale pursuant to Subscription Agreements will be increased to $3,500,000.

 

		●	The Company further desires to amend the terms of the Notes to amend the maturity date of the Notes pursuant
to the Amendment to Convertible Promissory Notes to December 31, 2018 in substantially the form attached hereto as Exhibit B (the “Note
Amendment” and together with the Subscription Amendment, the “Amendments”).

 

		●	After extensive consideration, analysis, and discussions and based on other relevant considerations, the
Board deems it advisable and in the best interests of the Company and its stockholders to approve the Amendments.

 

		●	Each of the Note Amendment and Subscription Amendment and the transactions contemplated thereby, is hereby
approved.

 

		●	The Chief Executive Officer, President or Chief Financial Officer of the Company from time to time (each
an “Authorized Officer” and, collectively, the “Authorized Officers”) be, and each of them hereby
is, individually authorized and empowered to execute and deliver to the appropriate parties, in the name and on behalf of the Company,
the Amendments, and schedules thereto, and other documents, agreements, instruments, and certificates, if any, to be delivered in connection
therewith, with such changes or modifications thereto as may be approved by any Authorized Officer, in such form and with such additions
and changes to any or all of such terms and conditions as any Authorized Officer may approve as necessary, desirable or proper, such Authorized
Officer's approval to be conclusively evidenced by the execution and delivery of any such agreement, instrument, certificate or related
document.

 

		●	The officers of the Company are authorized and directed to execute and deliver all documents and take
whatever action is deemed necessary or advisable to comply with all applicable state and federal securities laws

 

     

     

    

 

		2.	Omnibus Resolutions

 

		●	The officers of the Company are authorized and empowered to take any and all such further action, to execute
and deliver any and all such further agreements, instruments, documents, certificates and communications and to pay such expenses, in
the name and on behalf of the Company or such officer, as any such officer may deem necessary or advisable to effectuate the purposes
and intent of the resolutions hereby adopted, the taking of such actions, the execution and delivery of such agreements, instruments,
documents, certificates or communications and the payment of such expenses by any such officer to be conclusive evidence of his or her
authorization hereunder and the approval thereof.

 

		●	Any and all actions taken by the directors or officers of the Company to carry out the purposes and intent
of the foregoing resolutions prior to their adoption are approved, adopted, ratified and confirmed.

 

This action by unanimous written consent shall
be effective as of the date the Company receives the unanimous consent of the Company’s directors. This action by unanimous written
consent may be executed in any number of counterparts, each of which shall constitute an original and all of which together shall constitute
one action. Any copy, facsimile or other reliable reproduction of this action by written consent may be substituted or used in lieu of
the original writing for any and all purposes for which the original writing could be used. This action by unanimous written consent shall
be filed with the minutes of the proceedings of the board of directors of the Company.

 

	/s/ Branislav Vajdic	 	Date:  January 18, 2018
	Branislav Vajdic	 	 
	 	 	 
	/s/ Willem Pieter Elfrink	 	Date: January 18, 2018
	Willem Pieter Elfrink

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