Caring for mom in the hospital, pissed at sibling.

I know I'm singing a familiar tune. Mom is the in the hospital and I'm there to take care of things. Surprisingly my brother who can't be bothered to follow through with lunch plans with my parents asks how he can help. I say someone needs to baby sit grandma at home. He agrees. While calling him to keep him up to date on my mom's status and what the doctor had to say, he goes on a little speech questioning how the doctor would know anything and how I wasn't competent to deal with it. That set me off. He then left a couple of hours earlier than agreed which I didn't particularly mind since I wouldn't have to deal with him. The thing that pushed me over the edge was when I got home and found nothing done. After spending 12+ hours in the hospital I still had to come home to empty out grandma's commode et al. The capper was the overflowing trash can in the kitchen. The stuff on top that made it overflow was stuff he put in it. I'm pissed.