Software for Post-Processing Analysis of Strain Curves: The D-Station

Sousa, Rafael Duarte de; Regis, Carlos Danilo Miranda; Silva, Ittalo dos Santos; Szewierenko, Paulo; Hortegal, Renato de Aguiar; Abensur, Henry

doi:10.36660/abc.20180403

home Sumário navigate_before Anterior Atual Seguinte navigate_next

home Sumário

Original Article • Arq. Bras. Cardiol. 114 (3) • May-Jun 2020 • https://doi.org/10.36660/abc.20180403 linkcopy

Software for Post-Processing Analysis of Strain Curves: The D-Station

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

Background The use of speckle-tracking echocardiography for evaluation of cardiac function has great applicability in different scenarios. The broad use of this method requires tools that allow the extraction of relevant data from strain curves and inclusion of these data in traditionally used parameters.

Objectives The present study aimed to present and validate a free software, called D-station, for analysis of strain curves.

Methods From raw data files, the D-Station determines the phases of the cardiac cycle, and simultaneously exhibits the strain and strain rate curves of different cardiac chambers. Validation of the software was done by global longitudinal strain (GLS), and the analyses were performed: 1) graphical comparison of EchoPAC and D-Station paired measurements in relation to equality line; 2) by coefficient of correlation of these measurements; 3) test of hypothesis (p > 0.05); and 4) Bland-Altman analysis.

Results The Spearman’s rho correlation coefficient indicated a strong correlation between the measurements. Results of the test of hypothesis showed a p-value = 0.6798 >> 0.05, thus also indicating an equivalence between the softwares. The Bland-Altman analysis revealed a bias ≤ 1% and dispersion ≤ 2% between the measurements. The tests showed that, for GLS values lower than 10%, there was a trend for higher percentage difference between the values, although the absolute values remained low.

Conclusion The D-Station software was validated as an additional tool to the EchoPAC, which uses the raw data from the strain and strain rate curves exported from a proprietary software. (Arq Bras Cardiol. 2020; 114(3):496-506)

Cardiovascular Diseases/diagnostic imaging; Prognosis; Echocardiography/methods; Ventricular Dysfunction, Left/physiopathology; Speckle Tracking

Subject	GLS_Echopac	GLS-D-Station	Subject	GLS_Echopac	GLS-D-Station	Subject	GLS_Echopac	GLS-D-Station
1	–17.90	–17.88	17	–19.00	–19.03	33	–24.40	–24.62
2	–7.90	–9.50	18	–16.90	–16.82	34	–19.10	–19.57
3	–10.50	–11.10	19	–19.500	–16.68	35	–7.40	–6.46
4	–8.50	–8.19	20	–19.80	–19.83	36	–2.70	–3.37
5	–13.30	–13.55	21	–16.70	–17.04	37	–5.70	–5.22
6	–18.40	–18.26	22	–20.50	–20.93	38	–4.50	–4.32
7	–4.60	–4.21	23	–14.90	–14.71	39	–10.50	–9.83
8	–21.60	–21.48	24	–20.20	–19.76	40	–9.40	–10.95
9	–16.20	–16.36	25	–17.80	–18.19	41	–10.60	–10.47
10	–11.90	–11.41	26	–20.10	–20.47	42	–11.10	–11.15
11	–8.80	–7.33	27	–17.30	–17.60	43	–3.20	–3.69
12	–17.30	–17.23	28	–17.50	–16.96	44	–8.20	–8.64
13	–20.40	–20.32	29	–21.20	–20.28	45	–6.60	–6.01
14	–19.80	–19.40	30	– 23.00	–23.06	46	–6.90	–6.85
15	–16.40	–15.27	31	– 20.70	–19.91	47	–10.60	–10.11
16	–19.20	–19.38	32	–21.10	–21.22	48	–8.80	–9.28

vertical_align_top show_chart

more_horiz close
- image
- translate
- link
- article
- vertical_align_top
- file_download
- show_chart
- image
- translate
- link
- article

location_on

Sociedade Brasileira de Cardiologia - SBC Avenida Marechal Câmara, 160, sala: 330, Centro, CEP: 20020-907, (21) 3478-2700 - Rio de Janeiro - RJ - Brazil, Fax: +55 21 3478-2770 - São Paulo - SP - Brazil
E-mail: revista@cardiol.br

rss_feed Acompanhe os números deste periódico no seu leitor de RSS