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An AI color jet width > 65 % of the left ventricular outflow tract diameter; Doppler vena contracta width > 0.6 cm; The pressure half-time of the regurgitant jet is < 200 ms; Early termination of the mitral inflow; Holodiastolic flow reversal in the descending aorta. Regurgitant volume > 60 ml; Regurgitant fraction > 50 %
It categorizes the dissection based on where the original intimal tear is located and the extent of the dissection (localized to either the ascending aorta or descending aorta or involving both the ascending and descending aorta). [38] Type I – originates in ascending aorta, and propagates at least to the aortic arch and often beyond it ...
Heart failure with preserved ejection fraction (HFpEF) is a form of heart failure in which the ejection fraction – the percentage of the volume of blood ejected from the left ventricle with each heartbeat divided by the volume of blood when the left ventricle is maximally filled – is normal, defined as greater than 50%; [1] this may be measured by echocardiography or cardiac catheterization.
The aortic valve is opened during systole, the driving force for it to open is the difference in pressure between the contracting left ventricle of the heart and the aorta. During cardiac diastole (when the heart chamber gets bigger) the aortic valve closes. [5] Aortic stenosis most commonly is the result of calcification of the cusps.
Medical ultrasound includes diagnostic techniques (mainly imaging techniques) using ultrasound, as well as therapeutic applications of ultrasound. In diagnosis, it is used to create an image of internal body structures such as tendons, muscles, joints, blood vessels, and internal organs, to measure some characteristics (e.g., distances and velocities) or to generate an informative audible sound.
Echocardiography is helpful in determining the severity of the disease by estimating the pulmonary artery systolic pressure. [32] This test can also show leaflet calcification and the pressure gradient over the mitral valve. [32] Severe mitral stenosis is defined as a mitral valve area <1.5 cm 2. [8]
Tetralogy of Fallot results in low oxygenation of blood. ... receiving 65% of the venous return to the heart, and is the main contributor of blood flow to the lower ...
Likewise, a positive current traveling away from the positive electrode and towards the negative electrode creates a negative deflection on the ECG. [65] [66] The red arrow represents the overall direction of travel of the depolarization. The magnitude of the red arrow is proportional to the amount of tissue being depolarized at that instance.
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