Thoracotomy vs. pericardiocentesis
Most often results from stab wounds; up to 80% of myocardial stab wounds may develop cardiac tamponade
GSW less likely to develop into tamponade because it is more difficult for the pericardium to seal the defect (larger, more irregular in shape) 
Those that cause BP instability, free or partially exposed should be removed
Most intramyocardial and intrapericadrial bullets can be left in place
Penetrating cardiac injury
Airway/Pulmonary
Blunt cardiac injury
Bronchial injury
Missile embolism
Diaphragmatic trauma
Cardiac contusion
Hemothorax