Should i be under the care of a trauma surgeon or a cardiologist for my heart contusion from a car accident?

Both: If u need emergency surgery - surgeon first and cardiology will also be imvolved.

Both: If you were involved in a car accident and suffered a cardiac contusion, a trauma surgeon is the best trained to rule out any further injury to other organ parts. A cardiologist should be involved to make sure you don't have any cardiac-related that needs further workup or followup.