A new method to estimate pulmonary vascular resistance using diastolic pulmonary artery-right ventricular pressure gradients derived from continuous-wave Doppler velocity measurements of pulmonary regurgitation

Sanae Kaga, Taisei Mikami, Michito Murayama, Kazunori Okada, Nobuo Masauzi, Masahiro Nakabachi, Hisao Nishino, Shinobu Yokoyama, Mutsumi Nishida, Taichi Hayashi, Daisuke Murai, Hiroyuki Iwano, Mamoru Sakakibara, Satoshi Yamada, Hiroyuki Tsutsui

研究成果: ジャーナルへの寄稿記事

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Pulmonary vascular resistance (PVR) is an important hemodynamic parameter in patients with heart failure, especially when the pulmonary arterial pressure is lower due to reduced stroke volume. Several echocardiographic methods to estimate PVR have been proposed, but their applications in patients with organic left-sided heart diseases have been limited. The aim of the present study was to examine the usefulness of our new method to estimate PVR (PVRPR) based on the continuous-wave Doppler velocity measurements of pulmonary regurgitation in these patients. In 43 patients who underwent right heart catheterization, PVRPR was calculated as the difference between the Doppler-derived early- and end-diastolic pulmonary artery (PA)-right ventricular (RV) pressure gradients divided by the cardiac output measured in the left ventricular outflow tract by echocardiography. The PVRPR correlated well with invasive PVR (PVRCATH) (r = 0.81, p < 0.001) without any fixed bias in Bland–Altman analysis. The conventional echocardiographic PVRs showed inadequate correlations with PVRCATH, or a obvious overestimation of PVRCATH. In the receiver operating characteristic analyses to determine the patients with abnormal elevation of PVRCATH (>3 Wood units, WU), the area under the curve was the greatest for PVRPR (0.964) compared to the conventional PVRs (0.649–0.839). PVRPR had 83 % sensitivity and 100 % specificity at the optimal cut-off value of 3.10 WU in identifying patients with PVRCATH >3 WU. Our simple and theoretical PVRPR is useful for the noninvasive estimation of PVR.

元の言語英語
ページ(範囲)31-38
ページ数8
ジャーナルInternational Journal of Cardiovascular Imaging
33
発行部数1
DOI
出版物ステータス出版済み - 1 1 2017
外部発表Yes

All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging
  • Cardiology and Cardiovascular Medicine

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