TABLE 2.

Myocardial cut-off sign performance for left ventricular pseudoaneurysm. Subjective determination of the myocardial cut-off sign by two fellowship-trained cardiothoracic radiologists. Objective determination of the myocardial cut-off sign determined by study cardiothoracic radiology fellow with the myocardial sac wall thickness at the aneurysm sac neck and at 1 and 2 cm from the neck, measured on diastolic images, and constituted by greater than 50% loss of wall thickness at 1 and 2 cm from the neck. The “True Positive” column refers to the 17 study patients with left ventricular pseudoaneurysm and the “False Positive” column refers to the 18 study patients with left ventricular aneurysm.

	True Positive (Pseudoaneurysm)	Sensitivity	False Positive (Aneurysm)	Specificity
Subjective: Reader 1	16/17	94%	1/18	94%
Subjective: Reader 2	17/17	100%	4/18	78%
Objective: Measurement at 1 cm (bilateral measurements)	31/34	91%	1/35*	97%
Objective: Measurement at 2 cm (bilateral measurements)	34/34	100%	17/35	51%

^*The morphology of a left ventricular aneurysm in one patient only allowed for a unilateral measurement and was the single false positive case.