Microcirculatory blood flow during cardiac arrest and cardiopulmonary resuscitation does not correlate with global hemodynamics: an experimental study

Table 3 Correlation coefficient (Spearman’s ρ) of microcirculatory and other measured variables during baseline, n = 18

	ABP	CBF	Lactate	HGB	Cerebral T
Small vessels (≤20 µm)
TVD (mm/mm²)	0.07	−0.46	0.29	0.15	0.11
PVD (mm/mm²)	0.06	−0.40	0.24	0.16	0.09
PPV (%)	−0.32	0.22	−0.28	−0.41	−0.03
MFI	0.05	0.18	−0.22	−0.25	−0.19
HI	−0.09	0.20	−0.29	−0.15	−0.32
Other vessels (>20 µm)
TVD (mm/mm²)	−0.33	0.24	−0.05	−0.30	−0.03
PVD (mm/mm²)	−0.34	0.27	−0.05	−0.30	−0.07
PPV (%)	0.15	0.43	0.47	0.33	0.23
MFI	0.23	0.25	−0.13	−0.02	−0.06
HI	0.10	0.26	−0.39	−0.13	−0.18

After Bonferroni adjustment for multiple correlations all correlations are non-significant
TVD total vessel density, PVD perfused vessel density, PPV proportion of perfused vessels, MFI microvascular flow index, ABP mean arterial blood pressure, CBF carotid blood flow, HGB hemoglobin level, T temperature