Doppler velocimetry of the middle cerebral artery and basilar artery in clinically healthy dogs of different age groups

Table 2 Mean ± standard deviation (SD) of the hemodynamic indexes of the middle cerebral arteries (right and left) and Basilar arteries compared between sex. Data obtained in a transcranial pulsed doppler examination of 58 clinically healthy dogs grouped by age (young, adult, elderly)

Arteries		RMCA		LMCA		BA
Indexes	Gender	Mean ± SD	P value	Mean ± SD	P value	Mean ± SD	P value
PI	Male	1.09 ± 0.29	0.761	1.17 ± 0.24	0.192	1.72 ± 0.47	0.924
PI	Female	1.06 ± 0.27	0.761	1.07 ± 0.22	0.192	1.73 ± 0.47	0.924
RI	Male	0.64 ± 0.10	0.802	0.64 ± 0.08	0.210	0.75 ± 0.08	0.461
RI	Female	0.63 ± 0.10	0.802	0.67 ± 0.07	0.210	0.76 ± 0.75	0.461
PSV (cm/s)	Male	27.4 ± 12.0	0.272	24.5 ± 9.09	0.424	52.4 ± 19.5	0.423
PSV (cm/s)	Female	31.4 ± 9.91	0.272	26.6 ± 7.72	0.424	56.9 ± 21.5	0.423
EDV (cm/s)	Male	10.1 ± 5.07	0.382	9.24 ± 3.38	0.785	13.4 ± 6.48	0.763
EDV (cm/s)	Female	11.6 ± 4.85	0.382	8.93 ± 3.59	0.785	13.9 ± 6.73	0.763

*Values were considered significant in a Student’s t-test when P < 0.05. RMCA: right middle cerebral artery; LMCA: left middle cerebral artery: BA: basilar artery; PI: pulsatility index; RI: resistivity index; PSV: peak systolic velocity; EDV: end-diastolic velocity

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