Final answer:
When attempting to determine whether an inlet ventricular septal defect from the apical four-chamber view is present, the echocardiographer should tilt the probe posteriorly.
Step-by-step explanation:
When attempting to determine whether an inlet ventricular septal defect from the apical four-chamber view is present, the echocardiographer should tilt the probe posteriorly. In the apical four-chamber view, the probe is placed at the apex of the heart with the indicator marker pointing towards the patient's left shoulder. Tilt the probe towards the patient's back to obtain the best visualization of the ventricular septum and assess for any defects.