Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Cardiac efficiency

J D Schipke1

  • 1Institut für Experimentelle Chirurgie Universität Düsseldorf, FRG.

Basic Research in Cardiology
|May 1, 1994
PubMed
Summary
This summary is machine-generated.

Cardiac efficiency, a complex measure, varies with different definitions and calculation methods. Understanding these nuances is crucial for accurate assessment and therapeutic interventions in cardiovascular medicine.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

[Tonometry and pachymetry to evaluate fluctuations of intraocular pressure in the context of SCUBA diving].

Die Ophthalmologie·2023
Same author

Oxygen-enriched air reduces breathing gas consumption over air.

Current research in physiology·2022
Same author

Last Word on Viewpoint: Why predominantly neurological decompression sickness in breath-hold divers?

Journal of applied physiology (Bethesda, Md. : 1985)·2016
Same author

Why predominantly neurological decompression sickness in breath-hold divers?

Journal of applied physiology (Bethesda, Md. : 1985)·2016
Same author

Physical exercise might influence the risk of oxygen-induced acute neurotoxicity.

Undersea & hyperbaric medicine : journal of the Undersea and Hyperbaric Medical Society, Inc·2013
Same author

Perioperative and long-term development of anxiety and depression in CABG patients.

The Thoracic and cardiovascular surgeon·2013
Same journal

Molecular mechanisms of coronary microembolization-induced MINOCA.

Basic research in cardiology·2026
Same journal

Protection against postoperative atrial fibrillation via antiplatelet aggregation induced by remote ischemic preconditioning during off-pump coronary artery bypass grafting.

Basic research in cardiology·2026
Same journal

Peroxisomal catalase and plasmalogen biosynthesis protect from oxidative stress in Barth syndrome cardiomyopathy.

Basic research in cardiology·2026
Same journal

Bicuspid aortic valve stenosis is characterized by increased angiogenesis, inflammation, and a higher valvular-to-systemic calcification ratio than tricuspid aortic valve stenosis.

Basic research in cardiology·2026
Same journal

Myofilament-level effects of aficamten increase diastolic chamber volumes and maintain cardiac output through preserved length-dependent force generation in healthy rat and canine myocardium.

Basic research in cardiology·2026
Same journal

Functional rejuvenation of endothelial cell aging by transient reprogramming.

Basic research in cardiology·2026
See all related articles

Area of Science:

  • Cardiovascular Physiology
  • Biomedical Engineering
  • Metabolic Studies

Background:

  • Cardiac efficiency lacks a universal definition, leading to challenges in comparing studies.
  • Various metrics like pressure-volume work and pressure-volume area are used depending on the focus (ventricular work vs. total mechanical work).
  • Myocardial oxygen consumption (MVO2) is a key denominator, with different assessments (unloaded contraction, arrested heart) needed for net efficiency or finer energy transfer analysis.

Purpose of the Study:

  • To explore the multifaceted definitions and measurement challenges of cardiac efficiency.
  • To discuss the role of hemodynamic determinants and therapeutic interventions in modulating cardiac efficiency.
  • To investigate the heart's intrinsic mechanisms for improving efficiency under varying oxygen supply conditions.

Related Experiment Videos

Main Methods:

  • Review of existing literature on cardiac efficiency definitions and measurement techniques.
  • Analysis of factors influencing cardiac efficiency, including hemodynamic parameters and substrate utilization.
  • Discussion of adaptive mechanisms in the heart, such as substrate switching and functional changes in response to oxygen availability.

Main Results:

  • Multiple definitions of efficiency exist, complicating comparisons and clinical application.
  • Accurate measurement of all variables for efficiency calculation remains a significant challenge, especially in clinical settings.
  • Drug effects on efficiency are difficult to isolate due to confounding hemodynamic changes.
  • The heart may adapt to decreased oxygen supply by altering substrate use or reducing function; myocardial stunning may represent a protective repair process.
  • Hypertrophied hearts show improved efficiency, possibly due to myosin shifts or metabolic pathway changes, though mechanisms are unclear.

Conclusions:

  • Standardization of cardiac efficiency definitions and measurement is needed for clinical and research consistency.
  • Understanding the heart's adaptive strategies for efficiency is vital for developing targeted therapies.
  • Further research is required to elucidate the precise mechanisms underlying cardiac efficiency adaptations and their physiological objectives.