The second phase is v-descent (first trough) and represents ventricular relaxation during late systole. At this point the AV valve rings ascend toward resting position, atrial pressure rises, and DV flow velocity decreases.
As the disease progresses, ventricular relaxation during late systole (v-descent) deepens.
Early return of reflected pressure waves (in the case of stiffer arteries) may increase central systolic pressure in the aortic root during late systole and may increase the workload of the left ventricle .
These results are compatible with the formation of either the type D pressure wave contour in the ascending aorta where the reflected wave arrives early in systole and merges with the incidental pressure wave or the type A configuration where peak systolic pressure occurs in late systole, with augmentation index greater than 12% .
If left ventricular stroke volume is decreased, reduction in flow in late systole
may occur, which induce a rounded appearance of aortic valve in late systole
It is widely accepted that an increase in arterial stiffness leads a premature return of reflected waves in late systole
, increasing central pulse pressure, thus systolic blood pressure (SBP).
Peak blood flow velocity in the true aortic lumen occurs early in systole; flow in the false lumen peaks in late systole
mid- or late systole
), length; pitch, quality (harsh vs.
In the early and late systole phases, vortices were created in TAA and AAA.
Furthermore, the late systole wave profile implies that the wall shear stress wave profile differed from that of DAA.
At the late systole phase, both the DAA and TAA cured wall shear distributions show a low wall shear stress area from the inlet to the middle of the aneurysm.
On routine physical examination, low-grade continuous murmur, peaking in late systole
was heard incidentally in the second left intercostal space.