Cardiovascular System Diagnostic and Therapeutic Procedures Flashcards
electrocardiogram (ECG, EKG)
graphic line recording that shows the spread of electrical excitation to different parts of the heart using small metal electrodes applied to the chest, arms, and legs.
ECGs help diagnose abnormal heart rhythms and myocardial damage.
cardiac catheterization (CC)
Passage of a catheter into the heart through a vein or artery to provide a comprehensive evaluation of the heart.
CC gathers information about the heart, such as blood supply through the coronary arteries and blood flow and pressure in the chambers of the heart as well as enabling blood sample collection and x-rays of the heart.
Holter monitor test
ECG taken with a small portable recording system capable of storing up to 24 hours of ECG tracings.
Holter monitoring is particularly useful in obtaining a cardiac arrhythmia record that would be missed during an ECG of only a few minutes duration.
nuclear: ECG that utilizes a radioisotope to evaluate coronary blood flow. In a nuclear stress test, the radioisotope is injected at the height of exercise. The area not receiving sufficient oxygen is visualized by decreased uptake of the isotope.
stress test: ECG taken under controlled exercise conditions. May show abnormal ECG tracings that do not appear during an ECG taken when the patient is resting.
cardiac enzyme studies
Blood test that measures troponin T, troponin I, and creatine kinase (CK-MB).
Cardiac enzymes are released into the bloodstream from damaged heart muscle tissue. Their presence in a blood specimen is consistent with myocardial damage.
lipid panel
Series of tests (total cholesterol, high density lipoprotein, low density lipoprotein, and triglycerides) used to assess risk factors of ischemic heart disease.
angiography
radiographic imaging of the heart and blood vessels after injection of a contrast dye.
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coronary angiography
angiography to determine the degree of obstruction of the arteries that supply blood to the heart. in coronary angiography, a catheter is inserted into the femoral artery and threaded to the aorta. The contrast dye outlines the coronary arteries and shows narrowing, stenosis, or blockage
digital subtraction (DSA)
angiography in which two radiographic images are obtained, the first one without contrast material, and the second one after a contrast material has been injected, and then compared by a computer that digitally subtracts the imaged of soft tissues, boned, and muscles, leaving only the image of vessels with contrast.
aortography
radiological examination of the aorta and its branches following injection of a contrast medium via a catheter
echocardiography (ECHO)
noninvasive diagnostic method that uses ultrasound to visualize internal cardiac structures and produce images of the heart. A transducer is placed on the chest to direct ultra high frequency sound waves toward cardiac structures. Reflected echoes are then converted to electrical impulses and displayed on a screen.
Doppler ultrasound
Noninvasive adaptation of ultrasound technology in which blood flow velocity is assessed in different areas of the heart.
Sound waved strike moving red blood cells and are reflected back to a recording device that graphically records blood flow through cardiac structures.
magnetic resonance imaging (MRI)
Noninvasive technique that uses radiowaves and a strong magnetic field, rather than an x-ray beam , to produce multiplanar cross-sectional images of blood vessels.
MRI provide information about aneurysms, cardiac structures, and cardiac output. Magnetic resonance angiography (MRA) is a type of MRI that provides highly detailed images of the blood vessels. MRA is used to view arteries and blockages within the arteries. A radiopaque contrast dye can by injected to provide greater detail of body structures.
multiple gated acquisition (MUGA)
Nuclear procedure that uses radioactive tracers to produce movie-like images of the structures of the heart, including the myocardium and the mitral tricuspid valves.
The MUGA scan shows the motion of the heart wall muscle and the ventricle’s ability to eject blood (ejection fraction)
phonocardiography
Imaging technique that provides a graphic display of heart sounds and murmurs during the cardiac cycle.
In phonocardiography, a transducer sends ultrasonic pulses through the chest wall and the echoes are converted into images on a monitor to assess overall cardiac performance.
scintigraphy
Diagnostic test that uses radiation emitted by the body after an infection or radioactive substances to create images of various organs or identify body functions and diseases.
Scintigraphy identifies infarcted or scarred areas of the heart that show up as “cold spots” (areas of reduced radioactivity), taken when the patient is at rest.