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.