It was the first time I encountered such a structure while reading an academic book. At first I thought it was a mistake, but then I thought it didn't look like it. I've been studying English a lot lately. Maybe my brain is tired. Maybe it's something very simple. I'd like you to take a look.
What does “which” refer to ? What's ''given'' short for? Can you write a similar sentence from daily life?
I quote the sentence from the book as it is :
This is also suggested by the provocation of coughing by palpation of the trachea at the thoracic inlet, which suggests tracheal collapse specifically. Although the dog has a grade IV/VI pansystolic left apical murmur, which, given its age, breed and progression, is most likely due to myxomatous mitral valve disease, there are features that suggest that the dog has not previously been in congestive heart failure
Note : Please do not get confused with medical terms. Think in terms of the whole. For example :
a grade IV/VI pansystolic left apical murmur
myxomatous mitral valve disease
Thank you.