4.7 Article

Aortic Reservoir Pressure Corresponds to Cyclic Changes in Aortic Volume Physiological Validation in Humans

期刊

出版社

LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1161/ATVBAHA.114.303573

关键词

aorta; vascular stiffness

资金

  1. National Heart Foundation of Australia [G11H5915]
  2. Exercise and Sports Science Australia Tom Penrose research grant
  3. National Health and Medical Research Council of Australia [569519]
  4. UK National Institute for Health Research Biomedical Research Centre Scheme
  5. British Heart Foundation Centre of Research Excellence Award
  6. British Heart Foundation [FS/10/38/28268, PG/08/115/25781] Funding Source: researchfish

向作者/读者索取更多资源

Objective-Aortic reservoir pressure indices independently predict cardiovascular events and mortality. Despite this, there has never been a study in humans to determine whether the theoretical principles of the mathematically derived aortic reservoir pressure (RPderived) and excess pressure (XPderived) model have a real physiological basis. This study aimed to directly measure the aortic reservoir (AR(direct); by cyclic change in aortic volume) and determine its relationship with RPderived, XPderived, and aortic blood pressure (BP). Approach and Results-Ascending aortic BP and Doppler flow velocity were recorded via intra-arterial wire in 10 men (aged 62 +/- 12 years) during coronary artery bypass surgery. Simultaneous ascending aortic transesophageal echocardiography was used to measure AR(direct). Published mathematical formulae were used to determine RPderived and XPderived. AR(direct) was strongly and linearly related to RPderived during systole (r=0.988; P<0.001) and diastole (r=0.985; P<0.001). Peak cross-correlation (r=0.98) occurred at a phase lag of 0.004 s into the cardiac cycle, suggesting close temporal agreement between waveforms. The relationship between aortic BP and ARdirect was qualitatively similar to the cyclic relationship between aortic BP and RPderived, with peak cross-correlations occurring at identical phase lags (AR(direct) versus aortic BP, r=0.96 at 0.06 s; RPderived versus aortic BP, r=0.98 at 0.06 s). Conclusions-RPderived is highly correlated with changes in proximal aortic volume, consistent with its physiological interpretation as corresponding to the instantaneous volume of blood stored in the aorta. Thus, aortic reservoir pressure should be considered in the interpretation of the central BP waveform.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据