It is a dynamic structure, whose size and shape change during the
cardiac cycle.
At the first
cardiac cycle t = 0.65 s, the maximum wall shear stress in the proximal 75% stenosis of the LAD is about 225 Pa in the fluid flow model and 275 Pa in the dispersed particle-fluid flow model.
In order to decrease the shoot time and the contrast agent's injection quantity, images in the first
cardiac cycle (donated by the
cardiac cycle S) after the injection of the contrast agent are analyzed in this study.
Figure 11 shows the segmentation results during the
cardiac cycle, with changes in time.
In this section, effective flow structures are observed in the diseased vessel (right carotid artery) by streamline velocity plot at regular time steps of a
cardiac cycle and by observing contour of wall shear stress on the wall of the vessel.
From the repetition feature of heart sound, it can be concluded that the width of the sliding window must be greater than two
cardiac cycles to ensure that the fetal heart beats at least two times in the window.
the sum of PEP and VET) from the total
cardiac cycle period, assessed as 60/HR (Crisafulli et al., 2000; Marongiu et al., 2013).
The second calculation was pulsatile (four
cardiac cycles) using a laminar solver, and the third calculation was pulsatile (four
cardiac cycles) where laminar-to-turbulent transition was included.
On the contrary, the CSA of the jugular varies over the
cardiac cycle, being a pulsatile large vein.
In a recent study, UCLA experts used a MRI technique called arterial spin labeling to measure the volume of cerebral arteries twice--once at the systolic phase of the
cardiac cycle, when the heart was pumping blood into the brain, and again at the diastolic phase, when the heart was relaxing.
a short, early, and limited period of the
cardiac cycle during which a stimulus elicits either a totally unexpected response or one that is less abnormal than expected considering the state of recovery from the preceding impulse.