Sunshine Heart Inc. (NASDAQ:SSH): Ki Yong Choi Files A New 13D

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

 

SCHEDULE 13D

 

Under the Securities Exchange Act of
1934

(Amendment No. )*

 

 

SUNSHINE HEART,
INC.

(Name of Issuer)

Common Stock

(Title of Securities)

86782U304

(CUSIP Number)

Nimish Patel, Esq.

c/o Mitchell Silberberg & Knupp

11377 West Olympic Boulevard

Los Angeles, California 90064

(310) 312-3102

(Name, Address and Telephone Number of Person
Authorized to

Receive Notices and Communications)

March 2, 2017

(Date of Event Which Requires Filing of
This Statement)

If the filing person has previously filed a statement on Schedule
13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(e), Rule
13d-1(f) or Rule 13d-1(g), check the following box.[ ]

*The remainder of this cover page shall be filled out for a
reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment
containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section
18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the Notes).

CUSIP No.  86782U304

1.            Names of Reporting Persons Ki Yong Choi IRS Identification Nos. of Above Persons (Entities Only)

2.             Check the Appropriate Box if a Member of a Group (See Instructions) (a) ¨ (b) x

3.             SEC Use Only

4.             Source of Funds (See Instructions)         PF

5.             Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e) ¨

6.             Citizenship or Place of Organization United States

Number of Shares Beneficially Owned by Each Reporting Person With: 7.             Sole Voting Power               100,000 8.             Shared Voting Power           0

9.             Sole Dispositive Power       100,000

10.           Shared Dispositive Power   0

11.           Aggregate Amount Beneficially Owned by Each Reporting Person     100,000

12.           Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) ¨

13.           Percent of Class Represented by Amount in Row (11) 6.1% (1)

14.           Type of Reporting Person (See Instructions)     IN

(1) Based on 1,636,743 shares of common stock outstanding as
of February 10, 2017 as reported by the Company in its registration statement on Form S-1, file no. 333-216053, filed with the
Securities and Exchange Commission on February 14, 2017.

Item 1.

Security and Issuer.

 

This Schedule
13D relates to the common stock, par value $0.0001 per share, of Sunshine Heart, Inc. (the “Company”). The Company
is located at 12988 Valley View Road, Eden Prairie, Minnesota 55344.

 

Item 2.

Identity and Background.

(a) The reporting person’s name is Ki Yong Choi.

(b) The reporting person’s address is 36 Great Circle
Drive, Mill Valley, California 94941.

(c) The reporting person is the president and sole shareholder
of Cathedral Hill Associates, Inc., a hotel operations and management corporation, which owns and operates three hotels.

(d) The reporting person has not, during the last five years,
been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).

(e) The reporting person was not, during the last five years,
a party to a civil proceeding of a judicial or administrative body of competent jurisdiction as a result of which the reporting
person was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities
subject to, federal or state securities laws or a finding of any violation with respect to such laws.

(f) The reporting person is a citizen of the United States.

Item 3.

Source and Amount of Funds or Other Consideration.

The reporting person acquired 100,000 shares
of the Company’s common stock with personal funds distributed to him by Cathedral Hill Associates, Inc. The total amount
of funds used to purchase the shares was approximately $422,500. The shares were purchased in the open market between January 2017
and March 2017. No funds were borrowed for these purchases.

Item 4.

Purpose of Transaction.

 

The reporting person has acquired the shares
of common stock for investment purposes. Depending on market conditions, continuing evaluation of the business and prospects of
the Company and other factors, the reporting person may dispose of or acquire additional shares of the Company’s common stock
or other securities of the Company or pursue strategic transactions as opportunities arise. Otherwise, the reporting person does
not, as of the date of this filing, have any plans or proposals that would relate to or result in:

(a) the acquisition of additional securities of the Company,
or the disposition of securities of the Company although, as noted above, the reporting person reserves the right to acquire or
dispose of the Company’s securities in the future;

(b) an extraordinary corporate transaction, such as a merger,
reorganization or liquidation, involving the Company or any of its subsidiaries;

(c) a sale or transfer of a material amount of assets of the
Company or any of its subsidiaries;

(d) any change in the present board of directors or management
of the Company, including any plans or proposals to change the number or term of directors or to fill any existing vacancies on
the board;

(e) any material change in the present capitalization or dividend
policy of the Company;

(f) any other material change in the Company’s business
or corporate structure;

(g) changes in the Company’s charter, bylaws or instruments
corresponding thereto or other actions which may impede the acquisition of control of the Company by any person;

(h) causing a class of securities of the Company to be delisted
from a national securities exchange or to cease to be authorized to be quoted in an inter-dealer quotation system of a registered
national securities association;

(i) a class of equity securities of the Company becoming eligible
for termination of registration pursuant to section 12(g)(4) of the Act; or

(j) any action similar to any of those enumerated above.

 

Item 5.

Interest in Securities of the Issuer.

 

The reporting person owns 100,000 shares
of the Company’s common stock, representing approximately 6.1% of the shares of common stock outstanding, based on 1,636,743
shares of common stock outstanding as of February 10, 2017 as reported by the Company in its registration statement on Form S-1,
file no. 333-216053, filed with the Securities and Exchange Commission on February 14, 2017. The reporting person has sole voting
and dispositive power over the common stock. Except as set forth in Item 3 above, the reporting person has not effected any transaction
in the Company’s common stock during the last 60 days.

 

Item 6.

Contracts, Arrangements, Undertakings or Relationships with Respect to Securities of the Issuer.

 

Not applicable.

Item 7.

Material to be Filed as Exhibits.

Not applicable.

SIGNATURE

After
reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true,
complete and correct.

Date: March 10, 2017

/s/ Ki Yong Choi

Ki Yong Choi