![]() However, Torres said that "the decision to rescan is a complicated question, and needs to be judged on an individual basis, taking into consideration the effects of the stress test. Overall, the researchers found that BA adversely affected the diagnostic value of the examination in 6.1 percent of patients. He added that they administered beta blockers for patients whose heart rate was higher than 65 bpm. Patients experiencing BA had a higher median heart rate (84.8 bpm), compared with those who did not (58.1 bpm). Torres said that there was no association between the occurrence of BA and age, sex, body mass index, history of asthma or chronic obstructive pulmonary disease, use of beta-blocker and scan duration. For the studies affected by BA, the mean number of coronary segments affected was 2.7, and the mean number of nonevaluable segments was 2.2. In 6.1 percent of these patients, respiratory motion caused at least one unevaluable coronary artery segment. Artifact 1 This 58-year-old female with long history of morbid obesity and oxygen-dependent lung disease presented to her pulmonologist complaining of chest. The researchers found that BA were detected in 11.3 pecent. Torres explained that patients at Toronto General undergo extensive breathing instructions, and practice exercised breath hold twice. They graded the effect of BA as evaluable or unevaluable. Detecting Motion Artifact ECG Noise During Sleeping by Means of a. Severe BA (stair-step artifact clearly visible on the chest wall on sagittal reformations). monitoring has become a helpful tool for detecting a number of heart diseases. ![]() Mild BA (blurring of vessels and bronchial walls on axial images, but stair-step artifact in the chest wall on sagittal reformations).The presence of BA was graded on a three-point scale by two cardiac radiologists, as: As a result of artifacts, normal components of the EKG can be distorted. Torres and colleagues defined breathing artifacts (BA) as the occurrence of motion artifact in axial images and the presence of stair-step artifact in the thoracic wall on sagittal reformatted images. What does artifact mean on heart monitor Electrocardiograph (EKG) artifacts are defined as EKG abnormalities, which are a measurement of cardiac potentials on the body surface and are not related to electrical activity of the heart. The researchers reviewed 115 consecutive CTCA studies performed on a 64-slice MDCT for exclusion of native coronary artery disease during March and April, 2007 involving 63 males, with a mean age of 59.6 years Breathing artifacts are common in coronary CT angiography (CCTA) with 64-slice multidetector CT (MDCT), and can adversely affect the diagnostic value of the exam, according to a retrospective review presented Tuesday at the 2009 annual meeting of the American Roentgen Ray Society (ARRS) in Boston.įelipe Torres, MD, from the Toronto General Hospital, University of Toronto, who presented the study, said its purpose was to evaluate breathing artifacts in CCTA performed with 64-row MDCT (Toshiba America Medical Systems) and the effect of these artifacts on vessel evaluability.
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