SIMULTANEOUS RECORDING OF CENTRAL BP AND ARTERIAL STIFFNESS DURING ECHO CORRELATES BETTER WITH LV DIASTOLIC FUNCTION THAN ROUTINE EXAMINE

Abstract

Objective: ASE guidelines for the diagnostics of the left ventricle (LV) of diastolic dysfunction in 2016 suggested using the method of non-invasive assessment of central blood pressure (CBP) and the augmentation index (Aix) in order to obtain more detailed information in patients with arterial hypertension (AH). Routine determination of CBP does not allow the procedure to be performed simultaneously with ultrasound, so that can affect the results of the study because hemodynamics can change significantly during this time. The BAT 41-2 device, developed in Ukraine, allows the performing of two studies at the same time. The purpose of this analysis was to determine whether this approach is better than routine research. Design and method: We included 37 patients with AH grade 2. An echocardiographic examination was done according to ASE guidelines for the diagnosis of diastolic dysfunction of the left ventricle in 2016, including evaluation of transmitral E/A and E/e’ ratios, deceleration time (Dt) and isovolumic relaxation time (IVRT). Routine examination of CBP and Aix standardized for heart rate 75 (Aix@75) was measured with Sphygmocor (ArCor, Australia) according to a standardized protocol. Simultaneous measurement of CBP and Aix@75 was done with BAT41-2 device (IKS-Techno, Ukraine). Simultaneous measurement was done during standard echo views were recorded while the routine examination was done 30-90 min after the ultrasound diagnostic was done. To evaluate associations we used Spearman correlation analysis with the IBM SPSS 26.0 software package. Results: In our analysis, we did not find any correlations of E/A with any of the other parameters. Both routine and simultaneous CBP measurement were associated with LV IVRT but for simultaneous CBP measurement, this association was greater (R = 0.197, P = 0.043, and R = 0.340, P = 0.049 respectively). E/e’ significantly correlated with routine Aix@75 and simultaneous Aix@75, but again the last association was more strong (R = 0.495, P = 0.037 and R = 0.504, P = 0.014 respectively). Simultaneous Aix@75 was also more associated with IVRT (R = 0.438, P = 0.010) than routine (R = 0.210, P = 0.038). Conclusions: Simultaneous registration of CBP and AiX during echocardiography is more associated with LV diastolic function parameters than a routine examination.