I want to know if a person with multiple leaking heart valves left untreated, is in any more danger than someone with a single leaking heart valve.
Depends on how severe the leak is. If multiple valves have only trace leakage then no its not more worrisome then someone with Mild, moderate or severe leakage in one valve because trace leakage is a very small amount and almost everyone one has some. Now if someone had multiple valves that were moderate or severe yes that is more worrisome then some one with only 1 mild, moderate or severe valve leakage. If multiple valves have only mild leakage i think 1 valve with severe leakage is still more severe. I am NOT a doctor so this is just things that i am fairly sure about but not 100% sure of. Go to a cardiologist and ask him/her if you want a reliable accurate answer.
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yes, it is more dangerous! have someone take that person to the ER right away or call 911!