We present a case of a patient with left ventricular pseudoaneurysm which was not noted on transthoracic echocardiography but incidentally detected by CT angiography in preparation of ablation therapy for ventricular tachycardia. The patient underwent successful surgical repair of the pseudoaneurysm. The case illustrates the utility of CT angiography for the diagnosis of this rare, but hazardous condition. (C) 2014 Society of Cardiovascular Computed Tomography. All rights reserved.