Beanie had his latest chemo dose today and they did an echocardiogram to find out what the heart murmur was about. Thankfully it's nothing at all to be concerned about, it's something that happens quite commonly in smaller dog breeds as they get older and it's caused by the valves in the heart stiffening up a bit and not quite closing fully properly so there's a little bit of leakage back into the previous chamber. The vet said it was quite minor and the sort of thing we'd want to check on in a year (yeah, well...), but we're all good for sedations to get his nails cut and his teeth properly cleaned so that's excellent.