Hello and welcome. My name is ***** ***** I am an experienced small animal veterinary surgeon, I will be very pleased to work with you today and will try my best to answer your question to your satisfaction.
This sort of procedure is something I have carried out quite a few times in my career and with care the chances are everything should be fine. These days the sedatives used are very safe and this should be significantly safer than a general anaesthetic.
I know you are worried about your Lab's heart but with sedation the heart rate will be very low and hence the heart less stressed.
She will be a bit stressed when she recovers, that's for sure but if this is the case she will not be so stressed about thunder etc.
it is a hard decision I know but it may be better to do something rather than nothing ...
I hope I have covered your question fully enough but if you would like further clarification or to talk things over a bit more then I will be on-line for the next hour or so and I will be more than pleased to continue working with you.Regards,Scott