Table 3.

Power spectrum analysis of mean arterial pressure (MAP) and mean cerebral blood flow velocity (CBFV) in ventricular assist device (VAD) cases and controls

VAD	VLF		LF		HF
	pMAP	pCBFV	pMAP	pCBFV	pMAP	pCBFV
VAD1	0.80	2.77	0.28	0.48	0.94	0.47
VAD2	2.34	7.94	2.41	3.77	0.32	1.46
VAD3	1.06	3.22	0.20	0.94	8.88	3.72
VAD4	3.26	6.55	4.42	3.67	2.15	1.79
VAD5	2.97	2.61	0.49	1.14	5.44	2.24
Mean ± SD	2.09 ± 1.11	4.62 ± 2.46	1.56 ± 1.84	2.00 ± 1.59	3.55 ± 3.58	1.94 ± 1.19
Control	VLF		LF		HF
	pMAP	pCBFV	pMAP	pCBFV	pMAP	pCBFV
C1	0.47	1.12	1.55	0.80	3.80	0.56
C2	1.52	4.92	0.08	0.61	2.44	1.42
C3	2.43	6.93	0.10	0.43	2.55	1.69
C4	0.95	2.72	0.23	0.65	0.17	0.25
C5	0.24	1.20	0.70	1.42	1.98	3.23
Mean ± SD	1.12 ± 0.88	3.38 ± 2.51	0.53 ± 0.62	0.78 ± 0.38	2.19 ± 1.31	1.43 ± 1.17
P	0.17	0.45	0.27	0.13	0.45	0.52

VLF, very low frequency (0.02-0.07 Hz); LF, low frequency (0.07-0.2 Hz); HF, high frequency (0.2-0.35 Hz). pMAP (in mmHg²) and pCBFV (in (cm/s)²) are spectral powers of MAP and mean CBFV respectively.

*P < 0.05 from t-test between VAD and Control.