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Cardiology MCQ: Echo Basics

All About Cardiovascular System and Disorders

Speed of ultrasound in body tissues is around: A. 1500 meters per second Speed of ultrasound is almost that in water, though there is some difference between various tissues. Reflections of ultrasound occur at interfaces between tissues and between blood and tissues, due to the difference in velocity. 20,000 meters per second B.

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Intravascular Ultrasound (IVUS) for Coronary Intervention

All About Cardiovascular System and Disorders

Coronary Intravascular Ultrasound (IVUS) equipment consists of an IVUS catheter, pullback device and the imaging console. Incomplete stent apposition can be detected by intravascular ultrasound. If lesion lengths have to be assessed, motorized pullback is required. For assessing lesion morphology a manual pullback can also be done.

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Cardiology MCQ: Harmonic Imaging

All About Cardiovascular System and Disorders

In harmonic imaging, if the frequency of ultrasound transmitted is 2.5 MHz, reception is on: A. 7 MHz Correct answer: B. 5 MHz If the transmit and receive frequency are the same in echocardiography, the image quality may be poorer because of higher levels interference and artifacts.

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Cardiology MCQ: Doppler Basics

All About Cardiovascular System and Disorders

The ultrasound reflected from red blood cells moving away from the transducer has: A. Lower frequency and colour coded blue Ultrasound reflected from red blood cells moving towards the transducer will be perceived as having higher frequency. Higher frequency and is colour coded red B. Higher frequency and colour coded blue C.

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Basic Principles of Colour Doppler Echocardiography

All About Cardiovascular System and Disorders

The principle of Doppler is that the frequency of sound wave coming from an object which is moving towards the ultrasound probe increases while that from an object moving away from the probe decreases. Colour Doppler echocardiography receives the ultrasound signals reflected from moving red blood cells in the heart.

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Transesophageal echocardiogram

All About Cardiovascular System and Disorders

Echocardiogram is an image of the heart using ultrasound. An ultrasound beam is transmitted into the body using a device known as transducer. Esophagus or food pipe is just behind the heart so that the distance which the ultrasound beam has to travel to reach the heart is also small.

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Fetal aortic valvuloplasty

All About Cardiovascular System and Disorders

Fetal cardiac intervention team included pediatric cardiology imaging specialist, fetal cardiology nurse practitioner, two interventional pediatric cardiologists, ultrasound radiologist, maternal-fetal medicine physician, fetal anaesthesiologist and maternal anaesthesiologist. Reference Ryan Callahan, Kevin G. Esch, Lynn A.

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