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Heyde's syndrome is a syndrome of gastrointestinal bleeding from angiodysplasia in the presence of aortic stenosis. [1] [2] It is named after Edward C. Heyde, MD, who first noted the association in 1958. [3] It is caused by cleavage of Von Willebrand factor (vWF) due to high shear stress forces from aortic valvular stenosis.
Aortic stenosis (AS or AoS) is the narrowing of the exit of the left ventricle of the heart (where the aorta begins), such that problems result. [1] It may occur at the aortic valve as well as above and below this level. [ 1 ]
Aortic stenosis. Aortic valve stenosis is abnormal narrowing of the aortic valve. This results in much greater LV pressures than the aortic pressures during LV ejection. The magnitude of the pressure gradient is determined by the severity of the stenosis and the flow rate across the valve. Severe aortic stenosis results in
In cardiology, aortic valve area calculation is an indirect method of determining the area of the aortic valve of the heart. The calculated aortic valve orifice area is currently one of the measures for evaluating the severity of aortic stenosis. A valve area of less than 1.0 cm 2 is considered to be severe aortic stenosis. [1] [2]
Extract power features from specific frequency bands, such as low-frequency (LF: 0.04–0.15 Hz) and high-frequency (HF: 0.15–0.4 Hz) components. Step5: Pattern Recognition or Diagnosis Apply machine learning or deep learning models to detect or classify cardiac events based on the time-frequency features.
It is described as the dissociation between the noisy and musical components of the systolic murmur heard in aortic stenosis. The harsh noisy component is best heard at the upper right sternal border radiating to the neck due to the high velocity jet in the ascending aorta. The musical high frequency component is best heard at the cardiac apex. [1]
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. This gradient represents the degree of obstruction that has to be overcome to eject blood from the left ...
Bruit, also called vascular murmur, [3] is the abnormal sound generated by turbulent flow of blood in an artery due to either an area of partial obstruction or a localized high rate of blood flow through an unobstructed artery.
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