How do bladder relaxants work to increase ejection fraction?

Bladder relaxant medication e.g., anticholinergics, smooth-muscle relaxants, calcium channel blocker can be used. These agents inhibit the binding of acetylcholine to the cholinergic receptor, thereby suppressing involuntary bladder contraction of any cause. In addition, they increase the volume of the first involuntary bladder contraction, decrease the amplitude of the involuntary bladder contraction, and may increase bladder capacity.