While napping, he suffered a massive heart attack and was pronounced dead shortly after 8 p.m. Autopsy results concluded that the traffic accident earlier in the day had caused a blood vessel in his chest to rupture, causing blood to leak into the sac surrounding the heart (known as haemopericardium.)

"You were right about the hemopericardium," said Peter with respect.

Hemopericardium refers to blood in the pericardial sac of the heart.

Thomas quizzed all the residents about possible hemopericardium.

The same points would have been made, but the physician would have been reassured that the diagnosis of hemopericardium was difficult and he'd done the best he could.

Common complications due to CPR include rib fractures, sternal fractures, bleeding in the anterior mediastinum, heart contusion, hemopericardium, upper airway complications, damage to the abdominal viscus - lacerations of the liver and spleen, fat emboli, pulmonary complications - pneumothorax, hemothorax, lung contusions.