hi dear complications possible complications include Infection - most imp risk is endocarditis though you will be prescribed antibiotics 2)Excessive bleeding during operation . can even be fatal some times 3)Blood clots – this is more likely if you have had mechanical valve less common with bioprosthetc valve ,u will be prescribed warfarin 4)The valve may wear out – this is more likely in people who have had a biological valve replacement for a long time. 5) Arrythmias faulty heart beats one of the very common complication post op ,can be taken care by medicines Overall, the risk of dying as a result of the procedure is estimated to be 1-3%. TVAR is at present is option for only thiose candidates who are not fit for open heart surgery or have more chances of complication or are more then 70 years of age it is not a choice but a substitute you have not mentioned you age ,your echo reports ,my suggestion is that go for a open heart AVR,unless it is contraindicated in your case it has a better prognosis, and long term better results dont worry thanks