Table 2.

Diagnostic Workup

	Frequency of diagnostic tests	Abnormality rate	No. (%)				P value
	N (%)	N (%.)	Male		Female
Cervicocerebral vascular imaging	364(88.6)	279(76.6)	192	(76.2)	87	(77.7)	0.757
Antiphospholipid antibodies	156(38.0)	21(13.5)	10	(10.3)	11	(18.6)	0.109
Tests for autoimmune diseases	164(39.9)	25(15.2)	12	(11.1)	13	(23.2)	0.041*
Thrombophilia	106(25.8)	29(27.4)	12	(16.7)	17	(50)	0.000*
TTE and/or TEE#	269(65.5)	20(7.4)	13	(7.3)	7	(7.8)	0.879
Holter	57(13.9)	3(5.3)	3	(7.7)	0	(0)	0.206

^#TTE: transthoracic echocardiography. TEE: transesophageal echocardiography.