[Correlation between the parameters of acoustic cardiography and BNP, LVEF and cardiac function grading in patients with chronic heart failure].

To explore the correlation between the parameters of the new generation of Acoustic Cardiography and brain natriuretic peptide (BNP), left ventricular ejection fraction (LVEF) and cardiac function grading in the diagnosis of heart failure. One hundred and sixty-eight inpatients, who were hospitalized in Department of Cardiology, Haikou People's Hospital from May 2016 to July 2017, were enrolled as heart failure group, including NYHA class Ⅰ(=29), NYHA class Ⅱ(=40), NYHA class Ⅲ(=64), NYHA class Ⅳ (=35). And eighty-seven patients with normal cardiac function were selected as healthy control group. The data of the two groups were analyzed after the Acoustic Cardiography test, BNP determination and LVEF examination. The differences in QRS duration, electromechanical activation time (EMAT), EMAT%, systolic dysfunction index (SDI), third heart sound (S3) and other indicators among the groups with different levels of cardiac function were statistically significant (<0.05). The difference in left ventricular systolic time (LVST) between the cardiac function grade Ⅰ and healthy group was not significant (>0.05), while the differences among the rest groups were significant. There was a positive correlation between QRS duration, EMAT%, SDI, S3 and BNP (=9.46, 11.38, 12.14, 9.67, respectively, <0.05); LVST and BNP were negatively correlated (=-14.27, <0.05). There was a negative correlation between QRS duration, EMAT%, SDI, S3 and LVEF (=11.24, -8.764, -2.393, -0.579, respectively, <0.05). There was a positive correlation between LVST and LVEF (=23.48, <0.05). There was a positive correlation between QRS duration, EMAT%, SDI, S3 and cardiac function grading (β=0.003, 0.234, 0.419, 0.352, respectively, <0.05). There was a negative correlation between LVST and cardiac function grade (β=-0.021, <0.05). The parameters of the Acoustic Cardiography test (EMAT%, EMAT, SDI, S3 ) are closely related to BNP, LVEF and cardiac function grading, and can be used as assistant indexes for the diagnosis and evaluation of heart failure.