Is a vascular ultrasound always done before heart bypass surgery?

Vascular ultrasound: Vascular ultrasound is often a part of a complete vascular workup before bypass is needed. It may not be necessary for emergency surgey.

Yes : Some kind of ultrasound imaging is almost always done before heart surgery. Carotid artery screening or saphenous vein mapping would be most common.

Echocardiography: Echocardiograms are ultrasound type test looking at how efficient the heart is working and how the valves are doing and yes it is part of the evaluation that can lead to a recommendation for heart surgery.