UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D
Under the Securities Exchange Act of 1934
(Amendment No. 11)

MEDCATH CORPORATION (MDTH)
(Name of Issuer)

Common Stock
(Title of Class of Securities)

58404W109
(CUSIP Number)

David Nierenberg
The D3 Family Funds
19605 NE 8th Street
Camas, WA 98607
(360) 604-8600

With a copy to:

Henry Lesser, Esq.
DLA Piper US LLP
2000 University Avenue
East Palo Alto, CA 94303
(650) 833-2000

(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications)
May 8, 2008
(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 ss.ss. 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box |_|.



1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSON

The D3 Family Fund, L.P.

2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |X| (b) |_|

3 SEC USE ONLY

--------------------------------------------------------------------------------
4 SOURCE OF FUNDS*

 WC
--------------------------------------------------------------------------------
5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
 PURSUANT TO ITEMS 2(d) OR 2(e) |_|


--------------------------------------------------------------------------------
6 CITIZENSHIP OR PLACE OF ORGANIZATION

 Washington
--------------------------------------------------------------------------------
 7 SOLE VOTING POWER

 483,096 common shares (2.5%)
 -----------------------------------------------------------------
 NUMBER OF 8 SHARED VOTING POWER
 SHARES
BENEFICIALLY 0
 OWNED BY -----------------------------------------------------------------
 EACH 9 SOLE DISPOSITIVE POWER
 REPORTING
 PERSON 483,096
 WITH -----------------------------------------------------------------
 10 SHARED DISPOSITIVE POWER

 0
--------------------------------------------------------------------------------

11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

For the reporting person listed on this page, 483,096; for all reporting

 persons as a group, 2,934,511 shares (15.1%)
--------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* |_|


--------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 15.1%
--------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*

 PN
--------------------------------------------------------------------------------

2


1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSON

The DIII Offshore Fund, L.P.

2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |X| (b) |_|

3 SEC USE ONLY

--------------------------------------------------------------------------------
4 SOURCE OF FUNDS*

 WC
--------------------------------------------------------------------------------
5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
 PURSUANT TO ITEMS 2(d) OR 2(e) |_|


--------------------------------------------------------------------------------
6 CITIZENSHIP OR PLACE OF ORGANIZATION

 Bahamas
--------------------------------------------------------------------------------
 7 SOLE VOTING POWER

 58,166 common shares (2.9%)
 -----------------------------------------------------------------
 NUMBER OF 8 SHARED VOTING POWER
 SHARES
BENEFICIALLY 0
 OWNED BY -----------------------------------------------------------------
 EACH 9 SOLE DISPOSITIVE POWER
 REPORTING
 PERSON 58,166
 WITH -----------------------------------------------------------------
 10 SHARED DISPOSITIVE POWER

 0
--------------------------------------------------------------------------------

11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

For the reporting person listed on this page, 558,166; for all reporting

 persons as a group, 2,934,511 shares (15.1%)
--------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* |_|


--------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 15.1%
--------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*

 PN
--------------------------------------------------------------------------------

3


1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSON

The D3 Family Bulldog Fund, L.P.

2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |X| (b) |_|

3 SEC USE ONLY

--------------------------------------------------------------------------------
4 SOURCE OF FUNDS*

 WC
--------------------------------------------------------------------------------
5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
 PURSUANT TO ITEMS 2(d) OR 2(e) |_|


--------------------------------------------------------------------------------
6 CITIZENSHIP OR PLACE OF ORGANIZATION

 Washington
--------------------------------------------------------------------------------
 7 SOLE VOTING POWER

 1,798,863 common shares (9.2%)
 -----------------------------------------------------------------
 NUMBER OF 8 SHARED VOTING POWER
 SHARES
BENEFICIALLY 0
 OWNED BY -----------------------------------------------------------------
 EACH 9 SOLE DISPOSITIVE POWER
 REPORTING
 PERSON 1,798,863
 WITH -----------------------------------------------------------------
 10 SHARED DISPOSITIVE POWER

 0
--------------------------------------------------------------------------------

11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

For the reporting person listed on this page, 1,798,863; for all reporting

 persons as a group, 2,934,511 shares (15.1%)
--------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* |_|


--------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 15.1%
--------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*

 PN
--------------------------------------------------------------------------------

4


1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSON

The D3 Family Canadian Fund, L.P.

2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |X| (b) |_|

3 SEC USE ONLY

--------------------------------------------------------------------------------
4 SOURCE OF FUNDS*

 WC
--------------------------------------------------------------------------------
5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
 PURSUANT TO ITEMS 2(d) OR 2(e) |_|


--------------------------------------------------------------------------------
6 CITIZENSHIP OR PLACE OF ORGANIZATION

 Washington
--------------------------------------------------------------------------------
 7 SOLE VOTING POWER

 94,386 common shares (0.5%)
 -----------------------------------------------------------------
 NUMBER OF 8 SHARED VOTING POWER
 SHARES
BENEFICIALLY 0
 OWNED BY -----------------------------------------------------------------
 EACH 9 SOLE DISPOSITIVE POWER
 REPORTING
 PERSON 94,386
 WITH -----------------------------------------------------------------
 10 SHARED DISPOSITIVE POWER

 0
--------------------------------------------------------------------------------
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 For the reporting person listed on this page, 94,386 shares; for all
 reporting persons as a group, 2,934,511 shares (15.1%)
--------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* |_|


--------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 15.1%
--------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*

 PN
--------------------------------------------------------------------------------

5


1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSON

Nierenberg Investment Management Company, Inc.

2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |X| (b) |_|

3 SEC USE ONLY

--------------------------------------------------------------------------------
4 SOURCE OF FUNDS*

 AF
--------------------------------------------------------------------------------
5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
 PURSUANT TO ITEMS 2(d) OR 2(e) |_|


--------------------------------------------------------------------------------
6 CITIZENSHIP OR PLACE OF ORGANIZATION

 Washington
--------------------------------------------------------------------------------
 7 SOLE VOTING POWER

 0
 -----------------------------------------------------------------
 NUMBER OF 8 SHARED VOTING POWER
 SHARES
BENEFICIALLY 2,934,511 common shares (15.1%)
 OWNED BY -----------------------------------------------------------------
 EACH 9 SOLE DISPOSITIVE POWER
 REPORTING
 PERSON 0
 WITH -----------------------------------------------------------------
 10 SHARED DISPOSITIVE POWER

 2,934,511
--------------------------------------------------------------------------------

11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

For the reporting person listed on this page, 2,934,511; for all reporting

 persons as a group, 2,934,511 shares (15.1%)
--------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* |_|


--------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 15.1%
--------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*

 CO
--------------------------------------------------------------------------------

6


1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSON

Nierenberg Investment Management Offshore, Inc.

2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |X| (b) |_|

3 SEC USE ONLY

--------------------------------------------------------------------------------
4 SOURCE OF FUNDS*

 AF
--------------------------------------------------------------------------------
5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
 PURSUANT TO ITEMS 2(d) OR 2(e) |_|


--------------------------------------------------------------------------------
6 CITIZENSHIP OR PLACE OF ORGANIZATION

 Bahamas
--------------------------------------------------------------------------------
 7 SOLE VOTING POWER

 0
 -----------------------------------------------------------------
 NUMBER OF 8 SHARED VOTING POWER
 SHARES
BENEFICIALLY 558,166 common shares (2.9%)
 OWNED BY -----------------------------------------------------------------
 EACH 9 SOLE DISPOSITIVE POWER
 REPORTING
 PERSON 0

WITH -----------------------------------------------------------------

10 SHARED DISPOSITIVE POWER

558,166

11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

For the reporting person listed on this page, 558,166; for all reporting

 persons as a group, 2,934,511 shares (15.1%)
--------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* |_|


--------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 15.1%
--------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*

 CO
--------------------------------------------------------------------------------

7


1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSON

David Nierenberg

2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |X| (b) |_|

3 SEC USE ONLY

--------------------------------------------------------------------------------
4 SOURCE OF FUNDS*

 AF
--------------------------------------------------------------------------------
5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
 PURSUANT TO ITEMS 2(d) OR 2(e) |_|


--------------------------------------------------------------------------------
6 CITIZENSHIP OR PLACE OF ORGANIZATION

 Washington
--------------------------------------------------------------------------------
 7 SOLE VOTING POWER

 0
 -----------------------------------------------------------------
 NUMBER OF 8 SHARED VOTING POWER
 SHARES
BENEFICIALLY 2,934,511 common shares (15.1%)
 OWNED BY -----------------------------------------------------------------
 EACH 9 SOLE DISPOSITIVE POWER
 REPORTING
 PERSON 0
 WITH -----------------------------------------------------------------
 10 SHARED DISPOSITIVE POWER

 2,934,511
--------------------------------------------------------------------------------

11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

For the reporting person listed on this page, 2,934,511; for all reporting

 persons as a group, 2,934,511 shares (15.1%)
--------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* |_|


--------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 15.1%
--------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*

 IN
--------------------------------------------------------------------------------

8

This Amendment No.11 to Schedule 13D (this "Amendment") amends the below-indicated items from the Schedule 13D previously filed by or on behalf of the undersigned parties (the "Reporting Persons"), as previously amended (the "Schedule 13D"), by supplementing such Items with the information below:

Item 5. Interest in Securities of the Issuer.

(a, b) The Reporting Persons, in the aggregate, beneficially own 2,934,511 common shares, constituting approximately 15.1% of the outstanding Shares. This percentage is based on number of Shares reported as outstanding as of March 31, 2008 in the Company's Form 8-K dated May 8, 2008.

9

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, each of the undersigned certifies that the information set forth in the Statement is true, complete and correct.

D3 Family Fund, L.P., D3 Family Bulldog Fund, and D3 Family Canadian Fund, L.P.

 By: Nierenberg Investment Management
 Company, Inc.

 Its: General Partner

May 13, 2008 By: /s/ David Nierenberg
------------------------- ------------------------------------------
 David Nierenberg, President


 DIII Offshore Fund, L.P.

 By: Nierenberg Investment Management
 Offshore, Inc.

 Its: General Partner

May 13, 2008 By: /s/ David Nierenberg
------------------------- -----------------------------------------
 David Nierenberg, President


 Nierenberg Investment Management
 Company, Inc.

May 13, 2008 By: /s/ David Nierenberg
------------------------- -----------------------------------------
 David Nierenberg, President


 Nierenberg Investment Management
 Offshore, Inc.

May 13, 2008 By: /s/ David Nierenberg
------------------------- -----------------------------------------
 David Nierenberg, President

May 13, 2008 /s/ David Nierenberg
------------------------- ---------------------------------------------
 David Nierenberg

10
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