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Table 2 Shunt grading using both transcranial doppler ultrasonography and transesophageal echocardiography

From: Transcranial doppler ultrasonography should it be the first choice for persistent foramen ovale screening?

SHUNT

TEE (N= 220 pts – TEE and TCD positive)

TCD (N= 220 pts – TEE and TCD positive)

% of the same grading using both methods

Small

56 (25.5%)

70 (31.8%)

62.1

Medium

123 (55.9%)

119 (54.1%)

68.3

Large

41 (18.6%)

31 (14.1%)

83.2

  1. TCD Transcranial Doppler Ultrasonography, TEE Transesophageal Echocardiography.