Fig. 1From: Microvascular effects of intravenous esmolol in patients with normal cardiac function undergoing postoperative atrial fibrillation: a prospective pilot study in cardiothoracic surgeryScreen shot of a regular vascular occlusion test (VOT) measured with the O3 Regional oximetry device. Desaturation and resaturation speeds are expressed in %/s. ∆StO2 is calculated as StO2 max – StO2 baseline and expressed in %. StO 2 tissue oxygen saturationBack to article page