The LLA Recordis waveform and identification of these fiducial points are documented in their patent. 4 An in-house algorithm identified points of aortic valve opening (AVO), aortic valve closure (AVC), mitral valve opening (MVO), and mitral valve closure (MVC).

AVO AVC MVO MVC Jurcut et al., EHJ 2008 Pattern I: Reduced Strain Amplitude JU Voigt, University Leuven, Belgium e.g. reduced strain in infarct regions Pattern I: Reduced Strain Amplitude JU Voigt, University Leuven, Belgium Pattern II: Altered Temporal Sequence Kukulski et al., JASE 2002 e.g. post-systolic shortening in acute ischemia

The 4 phases of a cardiac cycle were defined as MVC-AVO (Stage 1), AVO-AVC (Stage 2), AVC-MVO (Stage 3) and MVC-MVO (Stage 4) according to the outflow pressure of the outflow of the T-LVAD and differential pressure between the outflow and inflow of the T-LVAD.

Feb 26, 2018 · As myocardial work value resulted in pressure and strain, his value provides from this interval (i.e. AVC–AVO), when the estimation of the pressure is the best. This questions on the added value of LVP estimation on top of strain curves.

Yellow dots indicate aortic and mitral valve opening and closure (AVO, AVC, MVO, MVC). AVC = aortic valve closed; AVO = aortic valve open; MVC = mitral valve closed; MVO = mitral valve open.

Seismocardiography (SCG) provides a rapid, non-invasive method for measuring cardiac cycle timing intervals by recording the vibrations produced by each heartbeat to identify the fiducial points pertaining to the aortic valve opening (AVO) and closing (AVC), and mitral valve opening (MVO) and closing (MVC).

Time interval from MVC to AVO is isovolumic systolic period. For the ascending limb, the upper part could be bending more, making the (t3-t1)/(t2-t1)>>2. From MVO to MVC, the spectrum border is like a straight line, but actually it is not.

Sep 6, 2023 · AVO and aortic valve closure (AVC) were assessed by continuous and pulsed-wave Doppler, with reference values obtained with pressure recordings from the ascending aorta and the LV. AVO was defined as the first LV-aortic pressure crossover in early systole and AVC as the peak negative first temporal derivative of the LVP (min dP/dt). 6

Global work index (GWI) represents the area of the loop from mitral valve closure (MVC) to mitral valve opening (MVO). Global constructive work (GCW) reflects the work that contributes to pump from aortic valve opening (AVO) to MVO.

During the contraction, the mitral valve (MV) closes, while the aortic valve (AV) opens to allow the blood in the left ventricle to be pumped into the aorta. The T wave represents the...