In individuals with HCM, the pulse pressure will decrease in the beat after the PVC ( Brockenbrough Braunwald Morrow sign ), while in aortic stenosis, the pulse pressure will increase.
42.
The Windkessel effect helps in damping the fluctuation in blood pressure ( pulse pressure ) over the cardiac cycle and assists in the maintenance of organ perfusion during diastole when cardiac ejection ceases.
43.
The engines used exhaust pulse pressure charging and developed 1, 200 horsepower ( 895 kW ) at 625 rpm, though in 1981 they were down-rated to 875 hp @ 600rpm.
44.
In some cases, it appears that a decrease in excessive diastolic pressure can actually increase risk, due probably to the increased difference between systolic and diastolic pressures ( see the article on pulse pressure ).
45.
Theoretically, the systemic pulse pressure can be conceptualized as being proportional to stroke volume, or the amount of blood ejected from the left ventricle during systole and inversely proportional to the compliance of the aorta.
46.
All three were two stroke engines equipped with Crossley's system of exhaust pulse pressure charging whereby surplus air in the exhaust manifold was forced back into the cylinder by the exhaust pulse from a neighbouring cylinder.
47.
In the past, most attention was paid to diastolic pressure; but nowadays it is recognised that both high systolic pressure and high pulse pressure ( the numerical difference between systolic and diastolic pressures ) are also risk factors.
48.
If the PDA is moderate or large, widened pulse pressure and bounding peripheral pulses are frequently present, reflecting increased left ventricular stroke volume and diastolic run-off of blood into the ( initially lower-resistance ) pulmonary vascular bed.
49.
Pulse pressure is determined by the interaction of the stroke volume of the heart, the compliance ( ability to expand ) of the arterial system largely attributable to the aorta and large elastic arteries and the resistance to flow in the arterial tree.
50.
While the Brockenbrough Braunwald Morrow sign is most dramatically demonstrated using simultaneous intra-cardiac and intra-aortic catheters, it can be seen on routine physical examination as a decrease in the pulse pressure in the post-PVC beat in individuals with HCM.
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