Ability of pulse power, esophageal Doppler, and arterial pulse pressure to estimate rapid changes in stroke volume in humans*
نویسندگان
چکیده
منابع مشابه
Total arterial compliance estimated by stroke volume-to-aortic pulse pressure ratio in humans.
On the basis of the windkessel model, the stroke volume-to-aortic pulse pressure ratio (SV/PP) has been proposed as an estimate of total arterial compliance, but recent studies have questioned this approximation. Aortic pressure was obtained at rest in 31 adults undergoing cardiac catheterization (47 ± 14 yr): controls ( n = 7), patients with dilated cardiomyopathy ( n = 10), and patients with ...
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Which means that SVV (%) ≈ pulse pressure variation (PPV; %) for FloTracTM. With the present mathematical equation, it can be demonstrated that the SVV calculated by FloTracTM (SVVFT) is not infl uenced by Khi, which means that SVVFT calculation does not include eff ective arterial elastance (Ea). Th e originality of Garcia and colleagues’ fi nding is that they realized that when measuring PPV ...
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THE DEVELOPMENT of appropriate animal models for investigating human hypertension has been extremely valuable for studies of the natural history and the pathophysiological mechanisms of the disease (21). It has been considered that there is a strong similarity between spontaneously hypertensive rats (SHR) and patients with essential hypertension. Both have their apparent onsets of the condition...
متن کاملImpact of arterial load on the agreement between pulse pressure analysis and esophageal Doppler
INTRODUCTION The reliability of pulse pressure analysis to estimate cardiac output is known to be affected by arterial load changes. However, the contribution of each aspect of arterial load could be substantially different. In this study, we evaluated the agreement of eight non-commercial algorithms of pulse pressure analysis for estimating cardiac output (PPCO) with esophageal Doppler cardiac...
متن کاملEstimating exercise stroke volume from asymptotic oxygen pulse in humans.
Noninvasive techniques have been devised to estimate cardiac output (Q) during exercise to obviate vascular cannulation. However, although these techniques are noninvasive, they are commonly not nonintrusive to subjects' spontaneous ventilation and gas-exchange responses. We hypothesized that the exercise stroke volume (SV) and, hence, Q might be accurately estimated simply from the response pa...
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ژورنال
عنوان ژورنال: Critical Care Medicine
سال: 2008
ISSN: 0090-3493
DOI: 10.1097/ccm.0b013e31818b31f0