Before starting chemotheraphy I had to have some testing done on my heart. Due to the results of the heart testing I was not allowed to have the strongest chemo, but a cousin to the strongest. I was told I had an enjection fraction of 45% at the time and Mitral Valve Prolaspe. Are these two the same...Mitral Valve being the name for how the blood flows. Also, I understand 45% to be a mild condition and was wandering if it decreases over time or stays stable? Since Chemo was the purpose for the heart exam, not much was explained to me about my results, just that for fear of more damage to the heart the strongest available to me was not recommended. Any thoughts or insights would be appreciated.