A recent study published in the New England Journal of Medicine confirms that CT angiography is effective in ruling out acute coronary syndromes, such as heart attack (also called myocardial infarction or MI). The test allows emergency physicians to safely discharge low to intermediate risk patients suspected of a potential heart attack in most cases. Delays in diagnosis of heart attack remain a common basis for medical negligence claims.
The study showed that CT angiography, where dye is injected into the bloodstream and then images are taken of the heart vessels, is effective in showing whether the patient has life-threatening coronary artery disease. Read more here: http://www.nejm.org/doi/full/10.1056/NEJMoa1201163