Subsequently pleurisy, pneumonia, or even pus in the pleural cavity often result.

Hemoptysis is a possible, but not a marked symptom.

The mechanism is identical with that of the bursting of an inflated paper bag when struck by the hand.

Other observers discard this theory of M.Gosselin and claim that the rupture is due to direct pressure, as in the cases in which the heart is ruptured without fracture of the ribs.

The theory of Gosselin would not explain these cardiac ruptures from external violence on the thoracic walls, and, therefore, was rejected by some.