The surgery performed for the replacement of the heart valve is usually considered to be safe. However, every surgical procedure is associated with a minimum number of risk factors or possible complications. Some of them include:
Bleeding during or after treatment due to damage of blood vessels
Blood clots leading to heart attack, stroke, or lung problems
Infection at the incision site
Infection in the new valve (endocarditis), which is more common with valve replacement
Pneumonia
Breathing problems
Arrhythmias (abnormal heart rhythms)
Valve failure
Bad reaction to anaesthetics