Related Experiment Video

Updated: Sep 9, 2025

Optocardiography and Electrophysiology Studies of Ex Vivo Langendorff-perfused Hearts
09:52

Optocardiography and Electrophysiology Studies of Ex Vivo Langendorff-perfused Hearts

Published on: November 7, 2019

13.1K

Salidroside ameliorates abnormalities in electrophysiological indices induced by perfusion of the heart with

Ruoning Yang1,2,3, Chi Yan1,2,3, Yifeng Zhou1,2,3

  • 1Department of Cardiology, The First Affiliated Hospital, XinXiang Medical University, Xinxiang, Henan, China.

Frontiers in Cardiovascular Medicine
|August 28, 2025
PubMed

Insights

Hypokalemia triggers dangerous heart arrhythmias, but paclitaxel (SAL) shows promise in improving these electrical abnormalities. SAL may offer a new treatment for arrhythmias by regulating inflammation, immunity, and energy metabolism.

Area of Science:

  • Cardiology
  • Molecular Biology
  • Pharmacology

Background:

  • Malignant arrhythmias due to hypokalemia are a significant risk factor for cardiac arrest.
  • The precise mechanisms underlying hypokalemia-induced arrhythmias are not fully understood.
  • Paclitaxel (SAL) has demonstrated potential in mitigating these cardiac electrical disturbances.

Purpose of the Study:

  • To investigate the effects of hypokalemia and paclitaxel (SAL) on cardiac electrophysiology.
  • To elucidate the molecular mechanisms by which hypokalemia and SAL influence heart function.
  • To assess the therapeutic potential of SAL in treating hypokalemia-related arrhythmias.

Main Methods:

  • Electrophysiological mapping was employed to assess heart rhythm abnormalities.
  • Transcriptomics analysis was used to investigate gene expression changes.
  • Isolated rat hearts were utilized to study the direct effects of hypokalemia and SAL.

Main Results:

  • Hypokalemia (3.5-2.0 mmol/L) dose-dependently induced abnormal arrhythmias and increased their incidence.
  • Paclitaxel (SAL) at 5 ug/ml significantly improved the hypokalemia-induced arrhythmias.
  • Transcriptomics revealed hypokalemia upregulated Mt-nd6 and disrupted inflammatory/immune pathways; SAL reversed these effects and activated PPAR-related genes.

Conclusions:

  • SAL effectively ameliorates electrophysiological abnormalities caused by hypokalemia.
  • SAL's therapeutic action involves the regulation of inflammation, immunity, and energy metabolism.
  • SAL demonstrates potential as a novel therapeutic agent for treating hypokalemia-associated arrhythmias.
Keywords:
arrhythmiacardiac electrophysiologyhypokalaemiasalidrosidetranscriptomic analysis

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