Doppler Effect Essay

Effect of chronic chest diseases on right ventricle I. Effects of chronic chest disease on right heart structure and function In patients with restrictive lung disease, right ventricular hypertrophy was estimated to be present in 50% of them (Figure15) (Shivkumaret al., 1994). Despite these changes in the structure of the right ventricle, myocardial systolic function is generally conserved in pulmonary hypertension associated with chronic lung disease (Vizza et al., 1998).…

Stethoscope You see almost every doctors have a thing wrapped around their neck. It’s a medical invention with the shape of an Y. An invention invented by a french physicians named René Lannec. He named the invention stethoscope. It’s a Y- shaped flexible plastic tube with an earpiece attached on each end. The stethoscope is an acoustic medical device for listening to the heart and lung. The stethoscope is divided into two separate portions or different ways of using it : For listening to…

Uterine fibroids are one of the most common causes of abnormal vaginal bleeding in women. These benign tumors are composed of smooth muscle and connective tissue. The ultrasound appearance of fibroids varies and depends on their size, location and type of degeneration they may be under-going. In most cases they are asymptomatic but if they grow large can cause symptoms including abnormal and/or heavy bleeding, painful menses, abdominal discomfort, back ache, constipation, and infertility.…

Ultrasound is a method of creating the best possible images to assist the Radiologist in the diagnosis of a patients pathology. This process occurs through sound waves. These sound waves have a frequency that is far beyond what humans can hear, although using these sound waves we are able to transmit ultrasound energy into the patient. Once the energy is inside the patient the structures reflect and distribute the sound which creates an echo. This echo is what allows us to produce an image of…

majority of pediatric cardiologists use echocardiography to some degree in their clinical practices. Over the years, pediatric echocardiography has proven to be an indispensible tool. Two-dimensional echocardiography, with M-mode and color-flow Doppler, had a great affect on pediatric cardiology since the 1980’s in the diagnosis and treatment of congenital heart disease (Noonan, 2004). Recently there have been several major advancements in the field of pediatric echocardiography that may…

Diagnostic tests used in diagnosis and management Individuals with no or only minor symptoms are often diagnosed as a result of family screening, detection of a murmur during routine examination, or the identification of an abnormal ECG. Any individual suspected of having HCM should undergo a comprehensive cardiac history and physical examination and an electrocardiogram (ECG). ECG testing is the most sensitive routinely performed diagnostic test for HCM, but the ECG abnormalities are not…

Weather: Tornadoes What are tornadoes, “the violently rotating winds of destruction”? A tornado is defined as a mobile, violently rotating column extending from a thunderstorm to the ground. The Damage that a tornado can cause depends on the wind speed and the size. The most Violent tornadoes are capable of tremendous destruction with wind speeds of two hundred and fifty miles per hour or more. Damage paths can be in excess of one mile wide and fifty miles long. In an average year, eight hundred…

the star and extrasolar planet are the same but the planet has a much greater acceleration while the star does not. c) The Radial Velocity/Doppler/Wobble method is used to find extrasolar planets by noticing their gravitational effect on the star’s they orbit. Smaller planets have a smaller effect on their sun while bigger planets have a much bigger effect on their sun. d) Astronomers measure this wobble by using spectroscopy. The spectrum is red when a star is moving away from us. The…

Have you ever seen a powerful wind storm that destroyed houses, uprooted, and totaled cars? What are these mysterious, naturally occurring wind storms? Nobody truly knows how long these mysterious wind storms have been around. They do know this; that they are naturally occurring. These mysterious wind storms are called tornadoes. Tornadoes are very destructive and can cause people to be homeless. What are tornadoes? A tornado is a mobile, destructive vortex of violently rotating winds having…

Exoplanets - what are they? Exoplanets, short for 'Extra solar planets', are planets that orbit around stars other than our sun. Nearly 2000 exoplanets have been discovered (1969 planets in 1249 planetary systems including 490 multiple planetary systems as of 1 October 2015). Why can't we detect exoplanets by direct observation - even with telescopes? The stars exoplanets orbit are much bigger and much brighter than the exoplanets, which are too near and are blurred out by the star's light. We…