high output heart failure

[scottish65]

Hi,
I am 45 yr old female who has highoutput heart failure on and off secondary to anemia.due to a partial gastrectomy for gasrtro paresis when I was 19 yrs old. due to gastric ulcers.I also had congentital bicuspid valve which was stenosed.Then I got endocarditis which further destroyed my aortic valve so bad it had to be replaced with a mechanical valve.I have been on coumadin since mt surgery in March but there has only been three weeks myINR has been within therapeutic range 2.5-3.5.I am currently taking 10mgs of coumadin daily at dinnertime,but my INR is still only 1.9.
I am concerned about a clot and lately I have been lightheaded and dizzy and I am always tachycardic.My question is what symptoms would I have if a clot was to start forming because I could not go through the operation again.I am aware of food restrictions,take my coumadin at the same time everyday and have not missed any doses.
please advise.
scottish 65

[kenkeith]

The symptoms would depend on the location of the clot.  If the clot is in the pulmonary vessel and/or lungs there would be high pulmonary vessel pressure and shortness of breath, right side heart failure, chest pain, etc.  If a coronary vessel becomes blocked, there can be chest pain, heart failure, heart arrest. A clot to the vessel going to the brain can cause stroke, coma, death as well a clot to the brain.