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PubMed · 15187752

Decrease in left ventricular ejection time on digital arterial waveform during simulated hypovolemia in normal humans.

Thomas Geeraerts·Pierre Albaladejo·Adrien Descorps Declère·Jacques Duranteau·Jean-Patrick Sales·Dan Benhamou
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Abstract

BACKGROUND: Left ventricular ejection time (LVET) measured in central arteries is modified during hypovolemia. We compared modifications of the pulse wave in a central artery (carotid) and in a peripheral artery (digital) during central hypovolemia induced by lower body negative pressure (LBNP) in conscious volunteers. METHODS: Hypovolemia was simulated with progressive LBNP (baseline, -10, -20, and -30 mm Hg) in nine young healthy volunteers. The carotid arterial pressure waveform was recorded using a Millar tonometric method. The digital pulse wave was measured with a volume-clamp method (Finapres) and the stroke volume with a thoracic impedance method (Biomed). RESULTS: Mean arterial pressure did not change during LBNP. Compared with baseline values, heart rate increased significantly at the -30 mm Hg level (68 +/- 13 beats/min vs. 59 +/- 11 beats/min), and stroke volume decreased as soon as -10 mm Hg was achieved (113 +/- 41 mL vs. 127 +/- 35 mL). Both carotid and digital LVET decreased significantly at the -10 mm Hg level (337 +/- 26 and 339 +/- 24 ms vs. 360 +/- 35 and 361 +/- 24 ms, respectively). CONCLUSION: Peripheral LVET could reflect variation of central LVET during LBNP and be a reliable noninvasive parameter for monitoring hypovolemia.

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AdultBlood PressureCarotid ArteriesHumansHypovolemiaMaleStroke VolumeTime FactorsJournal Article

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Thomas Geeraerts, Pierre Albaladejo, Adrien Descorps Declère, Jacques Duranteau, Jean-Patrick Sales, Dan Benhamou. 2004. Decrease in left ventricular ejection time on digital arterial waveform during simulated hypovolemia in normal humans.. https://doi.org/10.1097/01.ta.0000063406.34651.e5

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