Click image to view individual frames

• Place a probe into the transverse pericardial sinus and sever the ascending aorta and pulmonary trunk.
• Lift the apex of the heart and cut the inferior vena cava just before it enters the right atrium. Identify the superior vena cava and cut the vessel just above where it enters the right atrium.
• Lift the heart by its apex to expose the four pulmonary veins, which enter the left atrium [cross-section]. Cut the veins as close as possible to the pericardial sac to avoid damaging the posterior wall of the left atrium.
• Cut the serous pericardium that separates the oblique pericardial sinus from the transverse pericardial sinus and remove the heart .

Links and References:
Grant's: 1.61
Netter: 203
Rohen/Yokochi: 251, 254