When abdominal pain, hypotension and fever occurs with a drop in platelet count during heparin therapy HIT II should be considered. An early diagnosis is essential for treatment of this life-threatening complication at an early stage.

The usual cause of acute MI is rupture of an unstable, not flow-limiting and thus angiographically possibly "silent" plaque. IVUI can provide immediate assessment of atheromatous wall changes and can thus help to decide on further specific interventional measures.