Optical rotation - Wikipedia
WebDextrorotation and laevorotation (also spelled levorotation) in chemistry and physics are the optical rotation of plane-polarized light. From the point of view of the observer, dextrorotation refers to clockwise or right-handed rotation, and laevorotation refers to counterclockwise or left-handed rotation.
Congenital Pericardial Agenesis - American College of Cardiology
WebJul 27, 2020 · Accordingly, as in echocardiography, CMR diagnosis of CPA relies more on the identification of indirect features, rather than direct ones. In complete left CPA, the levorotation of the heart with postero-lateral shift of LV apex is easily recognizable on axial images (Figure 4A-B).
A CASE OF EXTREME LEVOPOSITION OF THE HEART:
WebMay 17, 2021 · We report a case of a complete absence of pericardium causing extreme levo- and posterior rotation of the heart with cardiomyopathy. Cardiac Magnetic Resonance Imaging (MRI) is the current gold standard to diagnose this entity.
Cardiac Malposition | Radiology Key
WebJan 11, 2016 · It is associated with CHD in fewer than 1% of cases. 11 However, an extreme leftward axis deviation or levorotation (severe levocardia) of greater than 57 to 75 degrees correlates with a significantly increased risk of a heart defect . 2,3 Abnormalities that can have pronounced levorotation include truncus arteriosus, Ebstein …
Optical Activity | ChemTalk
WebLevorotatory Optical Activity. Direction: When seen along the direction of light propagation, levorotatory compounds rotate plane-polarized light in a counterclockwise direction. Usually, scientists indicate this rotation with a negative angle, such as -10 degrees.
Functional MRI of Congenital Absence of the Pericardium | AJR
WebMR images obtained with turbo spin-echo sequence in transverse plane (TR/TE, 1,846/8.6) show interposition ( arrow, A) of lung between aorta (A) and main pulmonary artery (P), which is pathognomonic of pericardial absence. Extreme levoposition and levorotation of heart are evident.
Levorotation Definition & Meaning | Merriam-Webster Medical
WebThe meaning of LEVOROTATION is left-handed or counterclockwise rotation —used of the plane of polarization of light.
Levorotation of the Fetal Cardiac Axis - LWW
WebResults. The 75 fetuses with heart defects diagnosed by prenatal sonogram had a mean cardiac axis of 56 ± 13°, compared with 43 ± 7° in normal fetuses ( P < .001). Using 57° (two SDs above the mean for normal fetuses) as the upper limit of normal, 33 of 75 (44%) abnormal fetuses versus none of 75 normal fetuses were identified.
Ultrasound in Obstetrics & Gynecology - Wiley Online Library
WebSep 2, 2010 · The CAx showed a tendency to be significantly higher (levorotation) at a gestational age of 11 + 0 to 11 + 6 weeks compared with a gestational age of between 12 + 0 and 14 + 6 weeks (Table 2).
Dextrorotation of the Heart | Circulation - AHA/ASA Journals
WebDextrorotation of the heart is a morphologic entity characterized by rotation to the right in both frontal and transverse planes of the body; the relative location of the cardiac chambers is normal.
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