Pulse pressure variation, stroke volume variation and dynamic arterial elastance
نویسندگان
چکیده
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 conventionally [4], the ratio PPV/SVVFT becomes a mirror of a dynamic Ea, as the conventional PPV selected integrates Khi (Figure 1). However, when the present innovative method is used, PPV and SVV should be sampled during the same period of time. In conclusion, we believe that dynamic Ea predicting arterial pressure response to volume loading in preloaddependent patients is an interesting physiological concept. However, this demonstration cannot be achieved without taking into consideration the impact of PPV/ SVV sampling.
منابع مشابه
0590. Impact of arterial tone changes on dynamic arterial elastance and the arterial pressure response to fluid administration
Introduction Dynamic arterial elastance (Eadyn), the relationship between pulse pressure variation (PPV) and stroke volume variation (SVV), has been suggested as a functional assessment of arterial load for predicting the arterial pressure response after volume expansion (VE). Although changes in Eadyn have been related with variations in arterial load, the effect of acute arterial tone changes...
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