Carvalho P, Paiva R P, Couceiro R, Henriques J, Quintal I, Muehlsteff J, Aubert X L, Antunes M
Department of Informatics Engineering, Science and Technology Faculty of the University of Coimbra, Pólo II, Coimbra, Portugal.
Annu Int Conf IEEE Eng Med Biol Soc. 2009;2009:3124-8. doi: 10.1109/IEMBS.2009.5332565.
Systolic time intervals are highly correlated to fundamental cardiac functions. In this paper we investigate the feasibility of using heart sound (HS) to accurately measure the opening and closing moments of the aortic valve, since these are crucial moments to define the main systolic timings of the heart cycle, i.e. the pre-ejection period (PEP) and the left ventricular ejection time (LVET). We introduce a HS model, which is applied to define several features that provide clear markers to identify these moments in the HS. Using these features and a comparative analysis with registered echocardiographies from 17 subjects, the results achieved in this study suggest that HS can be used to accurately estimate LVET and PEP.
收缩期时间间期与基本心脏功能高度相关。在本文中，我们研究了利用心音（HS）准确测量主动脉瓣开闭时刻的可行性，因为这些时刻对于确定心动周期的主要收缩期定时至关重要，即射血前期（PEP）和左心室射血时间（LVET）。我们引入了一种心音模型，该模型用于定义多个特征，这些特征可作为清晰的标记物来识别心音中的这些时刻。利用这些特征并与17名受试者的注册超声心动图进行对比分析，本研究取得的结果表明，心音可用于准确估计左心室射血时间和射血前期。
