Journal of Arrhythmia (Apr 2017)

Comparison of the measured pre-ejection periods and left ventricular ejection times between echocardiography and impedance cardiography for optimizing cardiac resynchronization therapy

  • Kazuki Noda, MD, PhD,
  • Hideaki Endo, MD, PhD,
  • Takahide Kadosaka, MD,
  • Takashi Nakata, MD,
  • Tasuku Watanabe, MD,
  • Yosuke Terui, MD,
  • Shoko Kajitani, MD,
  • Yuto Monnma, MD,
  • Kenjiro Sato, MD, PhD,
  • Masanori Kanazawa, MD, PhD,
  • Sota Nakajima, MD, PhD,
  • Masateru Kondo, MD, PhD,
  • Tohru Takahashi, MD, PhD,
  • Akihiro Nakamura, MD, PhD,
  • Eiji Nozaki, MD, PhD

DOI
https://doi.org/10.1016/j.joa.2016.08.003
Journal volume & issue
Vol. 33, no. 2
pp. 130 – 133

Abstract

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Background: The pre-ejection period (PEP) and left ventricular ejection time (LVET) are easily measured by impedance cardiography (ICG). We hypothesized that the PEP/LVET measured by ICG would correlate with that measured by echocardiography, and that PEP/LVET measured by ICG would be useful for cardiac resynchronization therapy (CRT) optimization. Methods: Newly CRT implanted patients were optimized by echocardiography. The PEP/LVET was measured by echocardiography and ICG in two different settings: optimized setting and right ventricle (RV)-only pacing. Results: The PEP/LVET was significantly decreased in the optimized setting compared with that in RV-only pacing (0.62±0.13 vs 0.75±0.16, p<0.05). The PEP/LVET values calculated by ICG and echocardiography were positively correlated (r=0.553, p=0.003). Conclusion: ICG was useful for the optimization of CRT.

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