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Figure 2: Continuous wave Doppler across a residual VSD indicating interventricular gradient of 36 mmHg. Unlike epicardial echocardiography using a neonatal transthoracic probe with a higher frequency (5-12 MHz), the lower frequency of microTEE probe (4 MHz) permits accurate Doppler evaluation

Figure 2: Continuous wave Doppler across a residual VSD indicating interventricular gradient of 36 mmHg. Unlike epicardial echocardiography using a neonatal transthoracic probe with a higher frequency (5-12 MHz), the lower frequency of microTEE probe (4 MHz) permits accurate Doppler evaluation