Dr. Somali Nguyen guides viewers through a four-view cardiac ultrasound using a phased array probe, ideal for deep imaging between ribs. He begins with the parasternal long axis view, placing the probe left of the sternum with reversed orientation. He then rotates to the parasternal short axis view to assess ventricular function, particularly ejection fraction. For the apical (four-chamber) view, he recommends sliding and flattening the probe, and repositioning the patient to their left side for better visualization. Finally, he demonstrates the subxiphoid view using the liver as an acoustic window, noting that this view may be uncomfortable for some patients. The lecture emphasizes probe positioning, patient adjustments, and anatomical landmarks for accurate cardiac assessment.