While I have a tissue valve and are not anti coagulated this doesn't mean it can be determined from examination.
I wouldn't be so certain of this, I like medical students and interns examining me just to have a laugh at their lack of knowledge, I have had a number of them say I have a very quite mechanical valve based just on my age and that at 47 the time of implant it would be expected to be mechanical. This to me shows nothing should be assumed.And if they're so hopeless that they can't figure out I'm on warfarin