Heart rate variability and target organ damage in hypertensive patients

Table 5 Comparisons of HRV measurement in the group of patients stratified by IMT

	Normal IMT					Thickening					Plaque					P-value
	Mean	St. Dev.	Quartiles			Mean	St. Dev.	Quartiles			Mean	St. Dev.	Quartiles
			1^st	2^nd	3^rd			1^st	2^nd	3^rd			1^st	2^nd	3^rd
AVNN	830.0	123.5	749.2	821.6	916.2	842.3	141.8	746.7	820.5	957.3	879.0	124.7	797.1	864.8	952.0	0.116
SDNN	140.1	48.8	105.3	132.3	171.3	121.7	34.3	94.2	115.3	147.2	116.9	33.3	93.3	111.6	136.9	0.049
SDANN	128.4	49.7	88.2	124.8	157.9	110.8	34.7	81.0	102.2	138.3	104.1	33.5	80.3	98.5	124.1	0.046
SDNN IDX	58.9	19.0	44.4	55.2	73.1	50.7	13.8	43.0	48.9	56.5	49.0	14.2	38.8	47.4	59.5	0.042
RMSSD	36.9	13.5	26.8	32.2	42.6	30.7	11.7	22.1	29.7	34.0	35.2	17.9	22.7	30.5	41.7	0.216
pNN50	12.5	9.1	5.9	8.2	16.5	9.2	9.1	2.8	6.1	11.3	10.6	10.0	3.1	8.3	15.5	0.195
TOTPWR	24209	16727	12113	19664	31647	17583	10891	9798	14497	22534	16480	9863	9300	13860	21255	0.049
ULF	19550	13805	9436	16075	25947	14453	9137	7958	11822	18562	13420	8327	7216	10942	17851	0.092
VLF	2590	1944	1113	2117	3172	1746	1101	1091	1514	1862	1640	1027	960	1325	2251	0.052
LF	1255	1040	471	1006	1863	819	627	493	688	934	726	595	357	568	934	0.009
HF	813	685	305	542	1299	566	517	178	499	617	694	661	229	477	914	0.376
LF/HF	1.78	0.98	1.05	1.53	2.25	2.02	1.25	1.14	1.55	2.71	1.33	0.75	0.82	1.13	1.68	0.002