In general, carvedilol relaxes the blood vessels and slows down the rhythmic beats of your heart. This allows for your blood to carry enough oxygen to and from your heart to allow it function and continue to provide enough blood flow to keep your other organs healthy, even if your heart has problems.
It also changed the definition and allocation of concurrent minutes. Concurrent therapy was defined as two residents who are not performing the same or similar activities at the same time, regardless of payer source. Both must be in the line of sight of the treating therapist or assistant.
Concurrent means happening at the same time, as in two movies showing at the same theater on the same weekend. You might notice another adjective, current, in concurrent. While current refers to something that is happening right now, concurrent describes two or more things happening at the same time. A prisoner who is serving two concurrent five-year sentences will serve those prison terms together, meaning that he'll probably get out of jail in five years rather than ten.