Hi im new to this forum. I've posted on the heart and cardiovascular forum. I've had asthma my whole life and i was JUST diagnosed with Long QT Syndrome. I have been put on Atenolol, a beta blocker, and I was wondering if it has caused any one's asthma to worsen. My asthma is moderate and i'm being monitored. If anyone had any experince with Atenolol or any other beta blockers, I would appreiate any advice.