03.06.2020 Views

Open Access e-Journal Cardiometry No.16 May 2020

We should mention that Cardiometry is a fine diagnostics tool to assess heart life expectancy. Our experts, using Cardiocode in “red zones” in intensive care units, have confirmed effectiveness of noninvasive measuring of the hemodynamics data on the cardiovascular system performance in critical patients with different severity degrees. The medical staff involved had a possibility not only to monitor the state in each critical patient, but also to predict and control the progression of a disease. We are going to publish some results of this pilot study in our next issues.

We should mention that Cardiometry is a fine diagnostics tool to assess heart life expectancy. Our experts, using Cardiocode in “red zones” in intensive care units, have confirmed effectiveness of noninvasive measuring of the hemodynamics data on the cardiovascular system performance in critical patients with different severity degrees. The medical staff involved had a possibility not only to monitor the state in each critical patient, but also to predict and control the progression of a disease. We are going to publish some results of this pilot study in our next issues.

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

a)

Figure 3. Low-frequency noise polynomial filtering results

b)

Тable 1. Evaluation of low-frequency noise filtering quality

Lead / Filter

V1 V2 V3 V4 V5 V6 I III aVR aVF II aVL

Newton high-frequency filter

RMSD,

* 77,4 343,9 251,4 212,6 150,6 119,4 58,1 185,9 94,9 180 178,6 104,9

mcV ** 79,8 391,2 244,2 197,3 140,5 110,4 60,8 184,4 91,9 176,6 173,8 106,3

S i

( q ) *** 92,4 376,3 251,8 226,9 146 102 61,4 190 99,4 184,8 184,6 106,9

**** 84,5 371,1 243,2 230,6 158,1 107,3 59,7 188,7 101,1 185,1 186,3 104,4

* 719,8 296,9 1086 808,4 790,3 626,7 368,8 1717,4 1223,6 1899,3 2081,6 677,9

RMSD,

** 808 952,8 1752,6 1499,6 1867,7 1565,7 139,3 1510,6 625,2 1444,9 1379,6 821,4

mcV

*** 215 257,8 395,3 328,1 449,3 617,7 149,4 69,1 174 130,9 201,6 58,2

n i

( q )

**** 207 201 565,9 422,8 424,8 388,8 103,2 963,5 494,9 966 971,2 483,4

* -39,5 -23,4 -29,9 -26,9 -33,8 -36,4 -42,4 -35 -29,4 -31,6 -25,6 -38,8

NAC, ** -35 -25,9 -33 -34,2 -39,9 -40,2 -40,6 -32,7 -29,3 -28,6 -20,7 -36,6

dB *** -25 -25,6 -26,8 -31,9 -30,1 -24,6 -39,8 -31,6 -27,6 -27,2 -16,7 -35,8

**** -27,6 -22,8 -29,5 -26,3 -30,6 -36 -32,1 -33,6 -26,4 -32,5 -31 -34,7

Butterworth high-frequency filter

RMSD,

* 81,4 396,6 303,4 237,1 167 132,7 68,8 197 110,2 194,2 197,4 109,7

mcV ** 84,4 450,8 292,2 216,7 152 123 71,7 191,8 105,1 186,7 188,1 110,2

S i

( q ) *** 97,9 433,7 310,4 253,5 160,9 112,8 73,1 197,9 113,4 195,6 200 110,7

**** 89,9 426,5 298,5 258,6 175,8 119,5 71,4 198,6 116,4 198,3 204,3 180,8

* 719,5 275,2 1080,7 805,9 789,2 625,9 368,3 1717,2 1223,2 1899 2081,2 677,8

RMSD,

** 807,9 944,8 1749,8 1498,7 1867,3 1565,3 137,8 1510,4 624,6 1444,6 1379,1 821,4

mcV

*** 214,4 229,8 380,7 321,4 447,9 617,2 147,8 64,9 171,4 127,1 197,6 57,1

n i

( q )

**** 206,3 164,1 555 416,2 422,1 387,4 100,9 963 494 965,1 970 483,2

NAC,

dB

* -39 -22,2 -28,3 -25,9 -32,9 -35,5 -41 -34,5 -28,1 -30,9 -24,8 -38,3

** -34,5 -24,7 -31,5 -33,3 -39,2 -39,3 -39,2 -32,3 -28,2 -28,1 -20 -36,3

*** -24,5 -24,3 -24,9 -30,9 -29,3 -23,7 -38,3 -31,2 -26,5 -26,7 -16 -35,5

**** -27 -21,6 -27,7 -25,3 -29,7 -35 -30,6 -33,1 -25,1 -31,9 -30,1 -34,4

Note: Designations of quantitative ECG signal processing results for electrodes:

* - H92SG, ** - H99SG, *** - MSGLT-05MGRT, **** - М2202А

of all attenuates the low- and high- frequency noises.

Figure 6 offers a Tukey diagram showing an accuracy

of the low-frequency noise attenuation coefficient calculation.

Our analysis of the quantitative results of multilead

ECG signal recording processing, with various

electrodes, allows us to note that a minor variability

is available between the RMSD values in the filtered

signals of the same ECG signal lead, however, due to

nonstationarity of the signal parameters, some insignificant

differences exist. Despite the above features,

the results of the low-frequency noise separation and

their calculated RMSD value, generated by using the

filters, show that the H92SG and H99SG electrodes

generate the highest RMSD noise value as compared

to electrodes MSGLT- 05MGRT and M2202A. Electrode

MSGLT-05MGRT generates the lowest RMSD

value in 7 of 12 analyzed ECG signal leads, while

92 | Cardiometry | Issue 16. May 2020

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!