(Circulation. 2002;106:2986.)
© 2002 American Heart Association, Inc.
Historical Review |
From the Cardiology Division, Department of Medicine, University of Connecticut Health Center, Farmington Conn.
Correspondence to Arnold M. Katz, MD, 1592 New Boston Rd, PO Box 1048, Norwich, VT 05055-1048. E-mail arnold.m.katz@dartmouth.edu
Key Words: physiology muscles contractility
An extract of the first 250 words of the full text is provided, because this article has no abstract. |
The discovery that end-diastolic volume regulates the work of the heart is generally credited to Ernest Henry Starling, who described this relationship in a series of papers between 1912 and 191414 and in his Linacre Lecture, which was given at Cambridge University in 1915 and published in 1918.5 In these papers, Starling and his collaborators acknowledge that they were not the first to describe this relationship6; they cite the work of Blix7 and Evans and Hill8 on the length-dependence of energy release by skeletal muscle, Franks 1895 description of the influence of diastolic volume on the work of the frog ventricle,9 and contemporary descriptions in canine10 and feline hearts.11 The present article reviews evidence that what we now call "Starlings Law of the Heart" or "The Frank-Starling Relationship" was widely appreciated by late 19th century physiologists.
The Length-Tension Relationship, Thermodynamics, and Muscle Energetics
Starlings Law of the Heart is a manifestation of the length-tension relationship seen in skeletal muscle, which was well known to physiologists during the second half of the 19th century. This relationship was discovered in 1832 by Schwann; Needham, who described this history,12 stated that Schwanns discovery "caused a great sensation among physiologists of the time," in part because this discovery was made at a time when muscle performance was being analyzed in terms of the then new science of thermodynamics. That contracting muscles liberate energy as both work and heat was first noted by Helmholtz, whose 1848 description of heat production by muscle "... lighted a flame which... burnt brightly in Germany
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