Evidence map›Paper›PMID 17657400›Full record

ReviewBasic research in cardiology2007

Excitation-contraction coupling and mitochondrial energetics.

Christoph Maack, Brian O'Rourke

Open access · greenAbstract readReview
In one paragraph

Review in Basic research in cardiology, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 136 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
136citing papers in PubMed, 1 pooled it
7.5field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

136 citing papers in PubMed, 1 synthesis or guideline pooled it, 254 citations in OpenAlex.

  1. Guideline
  2. Trial
  3. Trial
  4. Article
  5. Biomarkers of Cardiac Metabolic Flexibility in Health, HFrEF and HFpEF.International journal of molecular sciences · 2026
    Review
  6. Article
  7. Review
  8. Review
  9. Increased Intermembrane Space [CaCirculation research · 2025
    Article
  10. Review
  11. Mechano-energetic uncoupling in heart failure.Nature reviews. Cardiology · 2025
    Review
  12. Article
  13. Review
  14. Article
  15. Article
  16. Review
  17. Article
  18. Review
  19. Article
  20. Loss of mitochondrial CaThe Journal of physiology · 2024
    Article

76 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors at 2 institutions in 2 countries.

Christoph MaackKlinik für Innere Medizin III, Universitätsklinikum des Saarlandes, 66421, Homburg/Saar, Germany. maack@med-in.uni-sb.de
Brian O'Rourke
Johns Hopkins University · USUniversitätsklinikum des Saarlandes · DE

Funding

STRUCTURE OF MITOCHONDRIAL K+ CHANNELSP01HL081427 · NHLBI · JOHNS HOPKINS UNIVERSITY · PI VAN EYK, JENNIFER E · 2005 to 2009
$11.2M
ENERGETIC REGULATION OF CARDIAC ION CHANNELSR37HL054598 · NHLBI · JOHNS HOPKINS UNIVERSITY · PI O'ROURKE, BRIAN · 2005 to 2014
$3.7M
NHLBI NIH HHS P01 HL081427NHLBI NIH HHS R37 HL054598NHLBI NIH HHS R37HL54598
6 · The paper itself

Abstract

Cardiac excitation-contraction (EC) coupling consumes vast amounts of cellular energy, most of which is produced in mitochondria by oxidative phosphorylation. In order to adapt the constantly varying workload of the heart to energy supply, tight coupling mechanisms are essential to maintain cellular pools of ATP, phosphocreatine and NADH. To our current knowledge, the most important regulators of oxidative phosphorylation are ADP, Pi, and Ca2+. However, the kinetics of mitochondrial Ca2+-uptake during EC coupling are currently a matter of intense debate. Recent experimental findings suggest the existence of a mitochondrial Ca2+ microdomain in cardiac myocytes, justified by the close proximity of mitochondria to the sites of cellular Ca2+ release, i. e., the ryanodine receptors of the sarcoplasmic reticulum. Such a Ca2+ microdomain could explain seemingly controversial results on mitochondrial Ca2+ uptake kinetics in isolated mitochondria versus whole cardiac myocytes. Another important consideration is that rapid mitochondrial Ca2+ uptake facilitated by microdomains may shape cytosolic Ca2+ signals in cardiac myocytes and have an impact on energy supply and demand matching. Defects in EC coupling in chronic heart failure may adversely affect mitochondrial Ca2+ uptake and energetics, initiating a vicious cycle of contractile dysfunction and energy depletion. Future therapeutic approaches in the treatment of heart failure could be aimed at interrupting this vicious cycle.

Indexed as

AnimalsCalciumEnergy MetabolismHeartHumansMitochondriaMyocardial ContractionMyocardiumCalcium

Identifiers

PMID17657400
PMCPMC2785083
OpenAlexW2039440815

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.