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A physician may recommend cardiac imaging to support a diagnosis of a heart condition. Medical specialty professional organizations discourage the use of routine cardiac imaging during pre-operative assessment for patients about to undergo low or mid-risk non-cardiac surgery because the procedure carries risks and is unlikely to result in the change of a patient's management. [1]
The patient is placed under a gamma camera, which detects the low-level 140 keV gamma radiation being given off by Technetium-99m (99m Tc). As the gamma camera images are acquired, the patient's heart beat is used to 'gate' the acquisition. The final result is a series of images of the heart (usually sixteen), one at each stage of the cardiac ...
A coronary CT calcium scan is a computed tomography (CT) scan of the heart for the assessment of severity of coronary artery disease. Specifically, it looks for calcium deposits in atherosclerotic plaques in the coronary arteries that can narrow arteries and increase the risk of heart attack. [ 1 ]
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Coronary CT angiography (CTA or CCTA) is the use of computed tomography (CT) angiography to assess the coronary arteries of the heart.The patient receives an intravenous injection of radiocontrast and then the heart is scanned using a high speed CT scanner, allowing physicians to assess the extent of occlusion in the coronary arteries, usually in order to diagnose coronary artery disease.
A 30-bed medical unit at Houston Medical Center is currently closed due to the limited staffing. “We currently have a number of unfilled positions available,” Rowley said.
From 1993 to 2001, myocardial perfusion scans in the US increased >6%/y with "no justification". [12] Myocardial perfusion imaging scans are "powerful predictors of future clinical events", and in theory may identify patients for whom aggressive therapies should improve outcome. But this is "only a hypothesis, not a proof". [12]
Heart surgeon Michael E. DeBakey (1908–2008), a faculty member and later Chancellor Emeritus of Baylor College of Medicine, performed the first removal of a carotid artery blockage (1950); the first aorto-coronary bypass surgery (1964); the first use of a ventricular assist device to pump blood and support a diseased heart (1966); and some of the first U.S. heart transplants (1968 and 1969 ...
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