Should a 93 year old female diagnoised with a blood clot on her heart, with the top & bottom of her heart not beating correctly, be given a pacemaker? She is in good health for her age, & never had surgery before, but getting a little demetia. What are the risks for this age, and is the cure worse than the problem? She is currently on Warfin to thin her blood. What will the quality of life be if she has this done?