Avascular necrosis of the femoral head after femoral neck fracture.

Trauma-induced avascular necrosis of the femoral head represents the most common femoral head aseptic necrosis. An alteration in blood supply to the femoral head is the cause of the vascular necrosis. Another mechanism in the genesis of femoral head necrosis is the tamponade effect.

Assessment of cardiac function by echocardiography in Paget's disease of bone.

Objective: To identify the mechanisms which influence the development of cardiac insufficiency in Paget's disease of bone (PD).

Methods: In this hospital-based case-control study 23 consecutive, recently diagnosed and untreated PD patients were compared against 23 controls frequency-matched by sex, age and body index. All subjects underwent non-invasive assessment of cardiac function by two-dimensional Doppler echocardiography.