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Biceps Tendon Rupture

Although acute ruptures of the LHB do occur, they are more commonly the end result of chronic biceps tendinitis. Acute ruptures can occur with a violent force placed on the LHB such as with a fall on an outstretched hand. Another traumatic event, which can cause significant damage to the LHB, is rapid deceleration of the arm during throwing activities .

In this case the deceleratory force can result in trauma to the origin of the LHB resulting in a SLAP lesion. If the force is great enough in a single traumatic event or on a repetitive basis, it can result in LHB rupture with an associated SLAP tear.

Chronic biceps tendinitis is a more common etiology resulting in eventual LHB rupture. The LHB becomes attenuated and weakened by the continued impingement between the humeral head and the coracoacromial arch. In these cases of impingement causing rupture, the rupture typically occurs around the area of the rotator cuff interval (a weak point for the LHB) rather than at its origin.

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