aortic pressure造句

• Afterload is largely dependent upon aortic pressure.
• The uncoupling of ventricular function from aortic pressure decreases the power expenditure of the heart.
• When the pressure in the left ventricle decreases, the aortic pressure forces the aortic valve to close.
• An elevated pressure difference between the aortic pressure and the left ventricular pressure may be indicative of Aortic stenosis.
• As soon as pulmonary pressure exceeds aortic pressure, shunt reversal ( right-to-left shunt ) occurs.
• This results in the slight increase in aortic pressure caused by the elastic recoil of the semilunar valves and aorta.
• Because of the fixed obstruction that the stenotic aortic valve represents, the post-PVC ascending aortic pressure will increase as well.
• Likewise in the systolic phase, the left ventricle must contract rapidly and forcibly to pump this blood into the aorta, overcoming the much higher aortic pressure.
• Importantly, under conditions of mechanical support mean aortic pressure ( MAP ) is maintained independent of native ventricular function, and ventricular and aortic pressures become uncoupled.
• Importantly, under conditions of mechanical support mean aortic pressure ( MAP ) is maintained independent of native ventricular function, and ventricular and aortic pressures become uncoupled.
• These studies demonstrated the restoration of heart rate, cardiac output and mean aortic pressures in animal subjects with complete heart block through the use of a myocardial electrode.
• The result of this is that the left ventricular pressure increases and the ascending aortic pressure " decreases ", with an increase in the LVOT gradient.
• At the later part of the ejection phase, although the ventricular pressure falls below the aortic pressure, the aortic valve remains open because of the inertial energy of the ejected blood.
• Aortic pressure is highest at the aorta and becomes less pulsatile and lower pressure as blood vessels divide into arteries, arterioles, and capillaries such that flow is slow and smooth for gases and nutrient exchange.
• The graph of aortic pressure throughout the cardiac cycle displays a small dip ( the " incisure " or " "'dicrotic notch "'" ) which coincides with the aortic valve closure.
• When the LV begins to contract and develop pressure, blood is still entering the LV from the aorta ( since aortic pressure is higher than LV pressure ), implying that there is no true isovolumic contraction.
• When a long cross-clamping period ( longer than 25 min ) or a drop in distal aortic pressure below 50-60 mmHg is anticipated, the use of an intraoperative shunt may prevent complications such as paraplegia.
• In individuals with aortic stenosis or with HCM with an outflow tract gradient, there will be a pressure gradient ( difference ) between the left ventricle and the aorta, with the left ventricular pressure higher than the aortic pressure.
• In research, the values obtained by an experienced knowledgeable physician using a mercury manometer and stethoscope listening for the Korotkoff sounds are typically within 10 mmHg of the pressures measured via higher sophistication internal measurements of central aortic pressures at heart level.
• Therefore, one could just as well say that venous return is determined by the mean aortic pressure minus the mean right atrial pressure, divided by the resistance of the entire systemic circulation ( i . e ., the systemic vascular resistance ).