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Murine Isolated Heart Model of Myocardial Stunning Associated with Cardioplegic Arrest
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Hemodialysis-induced Myocardial Stunning with No Obstructive Coronary Artery Disease: Pathophysiological Significance

Masashi Yokoi1, Tsuyoshi Ito1, Wataru Suzuki2

  • 1Department of Cardiology, Nagoya City University Graduate School of Medical Sciences, Japan.

Internal Medicine (Tokyo, Japan)
|December 3, 2023
PubMed

Insights

Hemodialysis-induced myocardial stunning is common but poorly understood. This case suggests coronary microvascular dysfunction, not blocked arteries, is key in this heart condition during dialysis.

Area of Science:

  • Cardiology
  • Nephrology
  • Physiology

Background:

  • Hemodialysis (HD) can cause myocardial stunning, a temporary heart dysfunction.
  • This condition is frequent and linked to worse patient outcomes.
  • The exact cause of HD-induced myocardial stunning remains unclear.

Observation:

  • A patient experienced myocardial stunning during hemodialysis.
  • This occurred despite having no significant blockages in their coronary arteries.
  • The patient was diagnosed with coronary microvascular dysfunction (CMD).

Findings:

  • Coronary microvascular dysfunction was present in a patient with hemodialysis-induced myocardial stunning.
  • Obstructive coronary artery disease was ruled out as the cause.
  • This suggests a new potential mechanism for myocardial stunning during dialysis.

Implications:

  • Coronary microvascular dysfunction may be a critical factor in hemodialysis-induced myocardial stunning.
  • Understanding this pathophysiology could lead to new diagnostic and treatment strategies.
  • Further research into CMD's role in dialysis patients is warranted.

Keywords:
coronary flow reservecoronary microvascular dysfunctionindex of microvascular resistancemyocardial ischemiamyocardial stunning

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