Comparison of Different Contrast Agents in Detecting Cardiac Right-to-Left Shunt in Patients with a Patent Foramen Ovale during Contrast-Transthoracic Echocardiography

Table 2

Diagnostic results of ASB and VSBS compared with those of TEE during the Valsalva maneuver.

VSBS	TEE		Total	ASB	TEE		Total
	Positive	Negative			Positive	Negative
Positive	49	5	54	Positive	41	4	45
Negative	3	27	30	Negative	11	28	39
Total	52	32	84	Total	52	32	84

ASB = agitated saline plus blood; VSBS = vitamin B₆ and 6 ml sodium bicarbonate solution; TEE = transesophageal echocardiography.