Journal Article

Incidental LAD stenosis identified on non–gated chest CTA

Makaryus, John N., Chan, Nicholas, Cohen, Stuart L., Yuen, Brian M., Yang, Ji, Boutis, Loukas

2018

Overview

A 57–year–old male former smoker presented to the Emergency Department (ED) with blurry vision, headache, and generalized weakness. He was hypoxic on room air and ECG showed sinus tachycardia. A CT pulmonary angiogram was ordered in the ED and revealed no pulmonary embolism but incidentally noted a likely significant stenosis in the proximal LAD. Subsequent cardiac catheterization revealed a 90% stenotic lesion with percutaneous coronary intervention leading to symptom resolution. Unlike coronary CTA, CTPA is performed with non–ECG gated helical scanning and generates motion artifacts associated with myocardial contraction. However, the timing of vascular contrast opacification during CTPA often allows for at least partial evaluation of the coronary arteries, especially ostial and proximal segments. Physicians ordering and evaluating noncardiac–focused CT chest studies, particularly in the ED, should remain cognizant of the radiographic appearance of underlying CAD, particularly life–threatening incidental coronary pathologies to allow for timely management and intervention.

• Publisher: Elsevier Inc,Elsevier Limited
• Subject: Arteries / Cardiac arrhythmia / Cardiovascular disease / Catheterization / Chest / Computed Tomography Angiography - methods / Contraction / Coronary Angiography - methods / Coronary artery / Coronary artery disease / Coronary Stenosis - diagnosis / Coronary vessels / Coronary Vessels - diagnostic imaging / Diagnosis, Differential / EKG / Embolism / Emergency / Emergency medical care / Headache / Humans / Hypoxia / Incidental / Incidental Findings / Lungs / Male / Medical imaging / Middle Aged / Multidetector CT coronary angiography / Stenosis / Tachycardia