Increased Afterload Following Myocardial Infarction Promotes Conduction-Dependent Arrhythmias That Are Unmasked by Hypokalemia

Lukas J. Motloch, Kiyotake Ishikawa, Chaoqin Xie, Jun Hu, Jaume Aguero, Kenneth M. Fish, Roger J. Hajjar, Fadi G. Akar

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Although the pathophysiological significance of resistant hypertension in post–myocardial infarction (MI) patients is established, the mechanisms by which increased afterload in that setting worsens outcome are unclear. With regard to sudden cardiac death, whether increased afterload alters the electrophysiological substrate after MI is unknown. We established a new large animal model of chronic post-MI remodeling with increased afterload that exhibits widespread deposition of fibrosis in remote areas from the anterior MI, mimicking the disease phenotype of patients with advanced ischemic heart disease. We identified the mode of initiation and mechanism of arrhythmias that were consistently unmasked by hypokalemia in this clinically relevant model.

Original languageEnglish
Pages (from-to)258-269
Number of pages12
JournalJACC: Basic to Translational Science
Volume2
Issue number3
DOIs
StatePublished - Jun 2017

Keywords

  • arrhythmias
  • conduction
  • hypokalemia
  • increased afterload
  • myocardial infarction

Fingerprint

Dive into the research topics of 'Increased Afterload Following Myocardial Infarction Promotes Conduction-Dependent Arrhythmias That Are Unmasked by Hypokalemia'. Together they form a unique fingerprint.

Cite this