When is contrast-enhanced CT angiography of the coronary arteries NOT indicated?
• Evaluation of the patency of a coronary artery bypass graft. • Noninvasive detection of coronary artery stenosis. • Suspected coronary artery anatomic anomalies. • Acute myocardial infarction with elevated cardiac enzymes and diagnostic ECG changes. • Pulmonary vein imaging in the context of ablation therapy for ectopic electrical activity. QUESTION 7 Regarding coronary CT angiography (CTA) as a triage tool for acute chest pain in the emergency department, which statement is TRUE? • Single-detector CT is adequate to assess the coronary arteries in the emergent setting. • It is indicated in patients with a high pretest probability of coronary artery disease. • Extending the protocol to include the pulmonary arteries and the thoracic aorta is an area of current investigation. • Negative findings on coronary CTA require conventional catheter angiography to exclude significant coronary artery disease. • Acute chest pain as a presenting symptom is usually caused by a coronary syndrome.
