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MUSCLE-POWERED VAD CHRONIC STUDIES IN CONSCIOUS ANIMAL

Award Number: R01HL059896
ORGANIZATION: NATIONAL HEART, LUNG, & BLOOD INSTITUTE
OPDIV: NIH
AWARD CLASS: DISCRETIONARY
AWARD ACTIVITY TYPE: SCIENTIFIC/HEALTH RESEARCH (INCLUDES SURVEYS)
PERIOD OF PERFORMANCE START DATE: 08/01/1999
PERIOD OF PERFORMANCE END DATE: 05/31/2008

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MUSCLE-POWERED VAD CHRONIC STUDIES IN CONSCIOUS ANIMAL - DESCRIPTION (provided by applicant): Using skeletal muscle as an endogenous power source is an attractive approach to long-term cardiac assistance. The principle advantage of this technique over current methods is that it obviates the need for extracorporeal power sources and provides a reliable, low-cost, self-sustaining source of energy without immune compromise or loss of patient autonomy. The applicants' long-range goal is to develop a safe and reliable means to harness energy from electrically stimulated skeletal muscle in order to assist the failing heart. The objective of this application is to assemble and test (in unrestrained, conscious dogs) a prototype ventricular assist system powered by linear in situ skeletal muscle contractions. The central hypothesis to be tested is that the mechanical power of conditioned skeletal muscle can be converted into hydraulic energy at levels sufficient to drive a ventricular assist device. In particular, on the basis of preliminary studies, skeletal muscle conditioned via long-term electrical stimulation is expected to yield roughly 2.0 mW per gram of muscle without fatigue - enough to provide substantial cardiac support. The rationale behind the proposed research centers on the fact that skeletal muscles express oxidative (fatigue-resistant) phenotypes in response to chronic activation and that these muscles have been shown to perform work at rates compatible with long-term cardiac assistance. Therefore, given the limitations of current medical therapies for congestive heart failure and the difficulties associated with delivering extracorporeal power to aid the failing heart, research to develop and test a muscle-powered blood pump is warranted. To accomplish the objectives of this research, the following three specific aims are proposed: 1) quantify MEC efficiency and steady-state power output in vivo and assess the physiologic adaptations which occur in skeletal muscle contracting under conditions of chronic circulatory support; 2) optimize the mechanical efficiency and durability of a muscle energy converter (MEC) designed to transform linear muscle contractions into hydraulic energy; and 3) assemble, bench-test, and implant a complete muscle-actuated ventricular assist system compatible with the steady-state power levels measured during MEC implant studies. Upon the conclusion of this research, the applicants expect to have definitively established the steady-state work capacity of electro-stimulated skeletal muscle and for the first time demonstrated the viability of harnessing energy from in situ muscle over prolonged periods (up to one year). The applicants further expect that practical application of this technology will have been demonstrated via implant testing of a complete muscle-actuated ventricular assist system.


Issue Date FY	Funding FY	Legal Entity Name	Legal Entity Address	Legal Entity City	Legal Entity State	Legal Entity Zip Code	Legal Entity COUNTY	Legal Entity COUNTRY	Assistance Listing	Award Code	Budget Year	Action Date	Action Type	Action Amount

Issue Date FY: 2007 ( Subtotal = $278,268 )
2007	2007	ALLEGHENY SINGER RESEARCH CORP	2 ALLEGHENY CTR, 11TH FLOOR	PITTSBURGH	PA	15212	ALLEGHENY	USA	Cardiovascular Diseases Research	000	8	5/29/2007	NON-COMPETING CONTINUATION	$278,268
														Subtotal = $278,268

Issue Date FY: 2006 ( Subtotal = $300,274 )
2006	2006	ALLEGHENY SINGER RESEARCH CORP	2 ALLEGHENY CTR, 11TH FLOOR	PITTSBURGH	PA	15212	ALLEGHENY	USA	Cardiovascular Diseases Research	000	7	5/29/2006	NON-COMPETING CONTINUATION	$300,274
														Subtotal = $300,274

Issue Date FY: 2005 ( Subtotal = $301,000 )
2005	2005	ALLEGHENY SINGER RESEARCH CORP	503 MARTINDALE STREET	PITTSBURGH	PA	15212	ALLEGHENY	USA	Cardiovascular Diseases Research	000	6	5/19/2005	NON-COMPETING CONTINUATION	$301,000
														Subtotal = $301,000

Issue Date FY: 2004 ( Subtotal = $310,000 )
2004	2004	ALLEGHENY SINGER RESEARCH CORP	503 MARTINDALE STREET	PITTSBURGH	PA	15212	ALLEGHENY	USA	Cardiovascular Diseases Research	000	5	5/3/2004	COMPETING CONTINUATION	$310,000
														Subtotal = $310,000

Issue Date FY: 2002 ( Subtotal = $405,800 )
2002	2002	ALLEGHENY SINGER RESEARCH CORP	503 MARTINDALE STREET	PITTSBURGH	PA	15212	ALLEGHENY	USA	Cardiovascular Diseases Research	000	4	7/26/2002	NON-COMPETING CONTINUATION	$405,800
														Subtotal = $405,800

Issue Date FY: 2001 ( Subtotal = $176,225 )
2001	2001	ALLEGHENY SINGER RESEARCH CORP	503 MARTINDALE STREET	PITTSBURGH	PA	15212	ALLEGHENY	USA	Cardiovascular Diseases Research	000	3	7/2/2001	NON-COMPETING CONTINUATION	$176,225
														Subtotal = $176,225

Issue Date FY: 2000 ( Subtotal = $332,772 )
2000	2000	ALLEGHENY SINGER RESEARCH CORP	320 East North Avenue	PITTSBURGH	PA	15212	ALLEGHENY	USA	Cardiovascular Diseases Research	000	2	7/3/2000	NON-COMPETING CONTINUATION	$332,772
														Subtotal = $332,772

Issue Date FY: 1999 ( Subtotal = $336,142 )
1999	1999	ALLEGHENY SINGER RESEARCH CORP	320 East North Avenue	PITTSBURGH	PA	15212	ALLEGHENY	USA	Cardiovascular Diseases Research	000	1	7/29/1999	NEW	$336,142
														Subtotal = $336,142

Grand Total All Awards = $2,440,481

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MUSCLE-POWERED VAD CHRONIC STUDIES IN CONSCIOUS ANIMAL

Award Number: R01HL059896

ORGANIZATION: NATIONAL HEART, LUNG, & BLOOD INSTITUTE

OPDIV: NIH

AWARD CLASS: DISCRETIONARY

AWARD ACTIVITY TYPE: SCIENTIFIC/HEALTH RESEARCH (INCLUDES SURVEYS)

PERIOD OF PERFORMANCE START DATE: 08/01/1999

PERIOD OF PERFORMANCE END DATE: 05/31/2008

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