** Heart disease drugmaker Cytokinetics' shares CYTK.O rise 5.7% to $40.17
** Rival Bristol Myers Squibb BMY.N stressed that it expects steady growth of heart drug Camzyos in 2025
** Says it is observing "strong global demand, high persistency and new patients coming on to therapy each week," especially after a recent update to its prescribing information
** The update allows for less frequent monitoring and simplifies treatment process for patients and doctors, J.P. Morgan analysts say
** "We also think the label update bodes well for the overall class and could expand the hypertrophic cardiomyopathy (HCM) market," — brokerage
** CYTK is developing a rival heart drug, aficamten, to treat non-obstructive form of HCM, an inherited condition characterized by thickening of heart muscles
** CYTK is expected to report Q1 results on May 6
** As of last close, CYTK has fallen 14.7% YTD