cryptoenic stroke might require assessment with longer term cardiac telemetry in an effort to identify paroxysmal AF.TEE usually is restricted to patients who have unexplained stroke (i.e.,with no risk factors for stroke).TEE is useful to assess the left atrium and left atrial appendage and to more effectively asessthe aortic or nonsep-tic,as well as thrombus formation tend to be better detected with TEE.concern about possible bacterial endocarditis mandates blood cultures.