Also found in: Medical.
Related to Presystolic: presystolic murmur


a.1.(Physiol.) Preceding the systole or contraction of the heart; as, the presystolic friction sound.
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019 LV: left ventricle, EF: ejection fraction, EDD: end diastolic dimension, ESD: end systolic dimension, EDV: end diastolic volume, ESV: end systolic volume, and TAPSE: tricuspid annular presystolic excursion.
In presystolic time, five-point place on anterior mitral leaflet, one point in junction of anterior mitral leaflet and septum and five-point in left atrium as shown in Figure 1.
The venous waveform in pregnant women also showed diminished phasic oscillations due to elevated presystolic flow.