Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  AMARANTH LLC
 2. Date of Event Requiring Statement (Month/Day/Year)
04/12/2006		 3. Issuer Name and Ticker or Trading Symbol
Healthcare Acquisition Partners Corp. [HAQPU]
(Last)
(First)
(Middle)
ONE AMERICAN LANE		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

GREENWICH, CT 06831		 6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Shares 1,985,150
D (1) (3)
 
Common Shares 77,350
D (2) (3)
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
AMARANTH LLC
ONE AMERICAN LANE
GREENWICH, CT 06831		     X    
AMARANTH GLOBAL EQUITIES MASTER FUND LTD

 		     X    

Signatures

Nicholas M. Maounis, Managing Member of Amaranth Advisors, L.L.C., Trading Advisor for Amaranth LLC 04/24/2006
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Represents shares directly owned by Amaranth LLC, a Caymans Islands exempted company ("Amaranth").
(2) Represents shares directly owned by Amaranth Global Equities Master Fund Limited, a Caymans Islands exempted company ("Global").
(3) Amaranth Advisors L.L.C., a Delaware limited liability company ("Advisors") is the trading advisor of Amaranth and Global. Nicholas M. Maounis ("Maounis") is the Managing Member of Advisors and therefore may be deemed to share beneficial ownership of the shares beneficially owned by Amaranth and Global. Amaranth, Global, Advisors and Maounis each disclaims beneficial ownership of the securities with respect to which indirect beneficial ownership is reported in this Form 3, except to the extent of its or his respective pecuniary interest therein. Pursuant to Rule 16a-1(4) promulgated under the Securities Exchange Act of 1934, as amended, each of the Reporting Persons herein states that the filing of this Form 3 and the statements made herein shall not be deemed an admission that he or it is the beneficial owner of any of the securities covered by this Form.

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