**5. Complications**

Malposition or migration- of the stent may occur due to more proximal deployment of the stent. If the stent does not achieve 2 point fixation, it remains unstable. The commonest site of embolization is descending aorta (**Figure 3**). The use of a long delivery sheath for confirming the position and preventing the slippage of the stent

#### **Figure 3.**

*Stent embolization: Figure shows stent (4 mm × 20 mm, Encurse) had embolized into the abdominal aorta at the level of left renal artery.*

minimises the risk. Sometimes, distal deployment of the stent can lead to migration of stent into branch pulmonary arteries.

Other Complications include balloon rupture, dissection, stent induced pulmonary oedema, arrhythmias, injury to adjoining structures and injury to tricuspid valve leading to tricuspid regurgitation, hypotension and hemodynamic instability during the procedure.
