What would be your next diagnostic test of choice for a patient with findings concerning for silent ischemia on noninvasive functional testing in the absence of chest pain?

There are a lot of unanswered questions just from the information given. Why was the test done in the first place if truly asymptomatic? If not having chest discomfort, were they having an anginal equivalent - such as a new complaint of shortness of breath with exertion not previously present? What ...