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

Authors :: Noda K
Endo H
Kadosaka T
Nakata T
Watanabe T
Terui Y
Kajitani S
Monnma Y
Sato K
Kanazawa M
Nakajima S
Kondo M
Takahashi T
Nakamura A
Nozaki E
Source :: Journal of arrhythmia [J Arrhythm] 2017 Apr; Vol. 33 (2), pp. 130-133. Date of Electronic Publication: 2016 Sep 12.
Publication Year :: 2017
Abstract: 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.<br />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.<br />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).<br />Conclusion: ICG was useful for the optimization of CRT.

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