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Quantification of Global Diastolic Function by Kinematic Modeling-based Analysis of Transmitral Flow via the Parametrized Diastolic Filling Formalism
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Sympathetic drive stimulating diastolic dysfunction?

Saad S Ahmad1, Myron C Gerson2,3

  • 1Division of Cardiology, Department of Internal Medicine, University of Cincinnati, Cincinnati, OH, USA. saad.ahmad@uc.edu.

Journal of Nuclear Cardiology : Official Publication of the American Society of Nuclear Cardiology
|February 11, 2017
PubMed
Summary
This summary is machine-generated.

Diastolic heart failure, affecting half of heart failure patients, may involve sympathetic nervous system changes. A study using MIBG imaging suggests a link between diastolic dysfunction and sympathetic denervation, paving the way for further research.

Keywords:
Atherosclerosisechocardiographyendothelial dysfunctionheart failure

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Area of Science:

  • Cardiology
  • Nuclear Cardiology
  • Cardiovascular Pathophysiology

Background:

  • Diastolic heart failure (DHF) represents a significant portion of heart failure cases, with its underlying mechanisms still under investigation.
  • The renin-angiotensin-aldosterone system has been a therapeutic target for heart failure with preserved ejection fraction (HFpEF) but has shown limited clinical benefit.
  • Increased sympathetic activity is hypothesized to contribute to the molecular alterations causing diastolic dysfunction.

Discussion:

  • This study investigated the association between diastolic dysfunction and sympathetic denervation using iodine-123 metaiodobenzylguanidine (MIBG) scintigraphy.
  • The findings suggest a potential role for sympathetic nervous system dysfunction in the pathophysiology of DHF.
  • MIBG imaging may serve as a valuable tool for assessing cardiac sympathetic innervation in DHF patients.

Key Insights:

  • A correlation was observed between diastolic dysfunction parameters and MIBG uptake, indicating sympathetic denervation.
  • The study provides evidence supporting the hypothesis that altered cardiac sympathetic activity contributes to diastolic dysfunction.
  • These results highlight the potential of targeting the sympathetic nervous system for DHF treatment.

Outlook:

  • Further research is warranted to explore the therapeutic implications of sympathetic denervation in DHF.
  • Future studies should focus on evaluating the efficacy of interventions aimed at modulating cardiac sympathetic activity in isolated diastolic dysfunction.
  • This work opens new avenues for understanding and managing DHF by considering neurohormonal imbalances.