Journal of Arrhythmia (Jan 2005)

Inverse Relation between Condition of Heart Failure and Intrathoracic Impedance Measured by Implantable Cardioverter Defibrillator—A case report—

  • Kohei Matsushita, MD,
  • Toshiyuki Ishikawa, MD,
  • Shinichi Sumita, MD,
  • Tsukasa Kobayashi, MD,
  • Hideyuki Ogawa, MD,
  • Noriko Inoue, MD,
  • Katsumi Matsumoto, MD,
  • Minoru Taima, MD,
  • Ichirou Nakazawa, MD,
  • Teruyasu Sugano, MD,
  • Tomoaki Ishigami, MD,
  • Kazuaki Uchino, MD,
  • Kazuo Kimura, MD,
  • Satoshi Umemura, MD

DOI
https://doi.org/10.1016/S1880-4276(05)80019-5
Journal volume & issue
Vol. 21, no. 5
pp. 553 – 555

Abstract

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The patient was a 78-year-old man with dilated cardiomyopathy. His cardio-thoracic ratio was 60.4% and left ventricular ejection fraction (LVEF) was 33%. He had been repeatedly admitted for congestive heart failure. He underwent implantation of an implantable cardioverter-defibrillator (ICD) for ventricular fibrillation. We compared the values of BNP and shock impedance stored by the ICD. The correlation coefficient (p-value) between BNP and shock impedance was −0.700 (p < 0.0005), increase of BNP and shock impedance was −0.778 (p < 0.0001), percent increase of BNP and shock impedance was −0.767 (p < 0.0005). In conclusion, there is an inverse relation between BNP and shock impedance, and measurements of shock impedance may be useful in the management of congestive heart failure.

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