Preload-corrected dynamic starling mechanism in patients with heart failure with preserved ejection fraction

Michinari Hieda, Erin Howden, Shigeki Shibata, Takashi Tarumi, Justin Lawley, Christopher Hearon, Dean Palmer, Qi Fu, Rong Zhang, Satyam Sarma, Benjamin D. Levine

研究成果: Contribution to journalArticle査読

5 被引用数 (Scopus)

抄録

The beat-Tobeat dynamic Starling mechanism (DSM), the dynamic modulation of stroke volume (SV) because of breath-by-breath changes in left-ventricular end-diastolic pressure (LVEDP), reflects ventricular-Arterial coupling. The purpose of this study was to test whether the LVEDP-SV relationship remained impaired in heart failure with preserved ejection fraction (HFpEF) patients after normalization of LVEDP. Right heart catheterization and model-flow analysis of the arterial pressure waveform were performed while preload was manipulated using lower-body negative pressure to alter LVEDP. The DSM was compared at similar levels of LVEDP between HFpEF patients (n = 10) and age-matched healthy controls (n = 12) (HFpEF vs. controls: 10.9 ± 3.8 vs. 11.2 ± 1.3 mmHg, P = 1.00). Transfer function analysis between diastolic pulmonary artery pressure (PAD) representing dynamic changes in LVEDP vs. SV index was applied to obtain gain and coherence of the DSM. The DSM gain was significantly lower in HFpEF patients than in the controls, even at a similar level of LVEDP (0.46 ± 0.19 vs. 0.99 ± 0.39 ml·m2·mmHg1, P = 0.0018). Moreover, the power spectral density of PAD, the input variability, was greater in the HFpEF group than the controls (0.75 ± 0.38 vs. 0.28 ± 0.26 mmHg2, P ± 0.01). Conversely, the power spectral density of SV index, the output variability, was not different between the groups (P = 0.97). There was no difference in the coherence, which confirms the reliability of the linear transfer function between the two groups (0.71 ± 0.13 vs. 0.77 ± 0.19, P = 0.87). The DSM gain in HFpEF patients is impaired compared with age-matched controls even at a similar level of LVEDP, which may reflect intrinsic LV diastolic dysfunction and incompetence of ventricular-Arterial coupling.

本文言語英語
ページ(範囲)76-82
ページ数7
ジャーナルJournal of Applied Physiology
124
1
DOI
出版ステータス出版済み - 1 2018
外部発表はい

All Science Journal Classification (ASJC) codes

  • 生理学
  • 生理学(医学)

フィンガープリント

「Preload-corrected dynamic starling mechanism in patients with heart failure with preserved ejection fraction」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル