Can you describe what you mean by sighing? What happens when he drinks water?
the sound is a combination of an 'arrghh' and a sigh. it can be very loud.
when he drinks water he is more likey to make the sound.
not really. although his breathing is a little shallow.
he had a whole host of cardiac tests last time he was in hospital (2 weeks ago), and they all indicated his heart was relatively fine.
since the fall his walking has been very limited. he is quite weak as he had a couple of weaks of vomiting and dizziness. but that has passed, but he hasn't really got back to eating normally.