I supposedly have a heart murmur, too. I am wondering as we age if we all aren't susceptible to a little bit of slosh in our valves.
I wish your friend and her cat good luck with this.
I, also, have a murmur. Have known about it since I was 21 - a long time ago. Mine is called a "functional" murmur - that's a murmur present without the presence of cardiac disease. Sometimes the doctors hear it - sometimes not.
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