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- W1576673520 abstract "A highly sensitive method of pressure detection is developed by digital signal processing using ASYST software. High-gain, diastolic left ventricular pressures (proximal and distal to the apex, LVPp, LVPd) were measured with a double-sensor micromanometer in the ventricular inflow tract in 10 closed-chest, atrioventricular (AV) blocked dogs paced at a rate of 80 bpm with AV delay of 150 ms. Periods of 5 s were digitally recorded and superimposed in a pressure-time coordinate system. During the initial phase of early diastole, LVPp fell more during a shorter time and to a lower value than LVPd. The rapid filling wave was higher, steeper and shorter at LVPp than at LVPd. After a mid-diastolic equilibrium during atrial contraction the LVPd elevated faster, higher and during a shorter time than LVPp. These differences in pressure and time resulted in a positive and negative intraventricular pressure gradient (IVPG) similar to the transmitral pressure gradient reflecting the dynamics of diastolic intraventricular flow. The analysis of IVPG provides a new method to study diastolic function. >" @default.
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- W1576673520 date "2002-12-04" @default.
- W1576673520 modified "2023-09-25" @default.
- W1576673520 title "Diastolic intraventricular pressure gradient analysed by digital signal processing" @default.
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- W1576673520 doi "https://doi.org/10.1109/cic.1990.144279" @default.
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