A pilot application of Korotkoff sound delay time in evaluating cardiovascular status

Abstract

Abstract. BACKGROUND: Korotkoff sounds have been used to measure systolic and diastolic arterial blood pressures noninvasively for over 100 years. However, most of the research concerning the Korotkoff sound were focused on the origin and frequency component analyzing the Korotkoff sound signal. OBJECTIVE: To show that the occurrence time of the Korotkoff sounds for each cardiac cycle demonstrates a characteristic value during the cuff deflating process of blood pressure measurement. METHODS: The Korotkoff sound delay time (KDT) decreases as the cuff pressure P deflates and KDT is a function of arterial transmural pressure. In the present research, an experiment system was established to explore the relationship between the KDT and the cuff pressure in different subjects. RESULTS: A pilot experiment was conducted to obtain different subjects' KDTs and investigate the relationship between KDT and cuff pressure. CONCLUSION: The relationship between KDT and invasive blood pressure was also studied and its potential application in detection of cardiovascular status was discussed.

B3X: a novel efficient algorithm for accurate automated auscultatory blood pressure estimation

“…In this case, the pressure reading at the beginning of phase 4, during which soft blowing sounds can be heard, is assumed as an indicator of DBP (O'Sullivan et al 2002, Babbs 2015, Campbell et al 2022. Many studies investigated the characteristics of the Korotkoff sounds phases by performing temporal analysis, spectral analysis, or time-frequency analysis (Ware and Anderson 1966, Allen and Murray 1997, Allen et al 2004, Xiang et al 2015. However, the contribution of inter-subject variability remains unknown (O'Sullivan et al 2002).…”

A Study on the Association between Korotkoff Sound Signaling and Chronic Heart Failure (CHF) Based on Computer-Assisted Diagnoses

“…Blood pressure monitoring that makes use of Korotko sound (KS) has been widely utilized to detect potential hypertension in patients [1][2][3]. KS enables shorter test duration, simple processing, and strong anti-interference capabilities and has clear signal characteristics.…”