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Tetralogy of Fallot was initially described in 1671 by the Danish researcher Niels Steensen. [ 1 ] [ 15 ] Also referenced as Nicolaus Steno in Latin, Stensen was a pioneer in anatomy and geology, his work making significant specific contribution to the fields of cardiac anatomy and pathology. [ 9 ]
A diagnosis of TOF is usually made with echocardiography, which can even be done prenatally. Most patients with tetralogy of Fallot will have cardiac repair surgery in the first year of life, where the ventricular septal defect is closed with a patch, and the right ventricular outflow tract is enlarged.
A time-of-flight mass spectrometer (TOFMS) consists of a mass analyzer and a detector. An ion source (either pulsed or continuous) is used for lab-related TOF experiments, but not needed for TOF analyzers used in space, where the sun or planetary ionospheres provide the ions. The TOF mass analyzer can be a linear flight tube or a reflectron.
Magnetic resonance angiograph created by the ToF method. For Magnetic Resonance Angiography (MRA), ToF is a major underlying method. In this method, blood entering the imaged area is not yet saturated, giving it a much higher signal when using short echo time and flow compensation. It can be used in the detection of aneurysm, stenosis or ...
The most common cause of right-to-left shunt is the Tetralogy of Fallot, a congenital cardiac anomaly characterized by four co-existing heart defects. Pulmonary stenosis (narrowing of the pulmonary valve and outflow tract, obstructing blood flow from the right ventricle to the pulmonary artery)
Time of flight of a light pulse reflecting off a target. A time-of-flight camera (ToF camera), also known as time-of-flight sensor (ToF sensor), is a range imaging camera system for measuring distances between the camera and the subject for each point of the image based on time-of-flight, the round trip time of an artificial light signal, as provided by a laser or an LED.
NEXT surveyed 1,500 small business owners aged 18-64 across industries and regions in late October and November 2024 to share findings about how economic factors are shaping business in the new year.
Other structural defects which lead to RVH include tetralogy of Fallot, ventricular septal defects, pulmonary valve stenosis, and atrial septal defects. [medical citation needed] RVH is also associated with abdominal obesity, elevated fasting blood glucose, high systolic blood pressure, and fractional shortening of the left ventricular mid-wall.