Yes they do make them small enough. They are called AICD's. Stands for automatic internal Cardiac Defibullator. They constantly monitor the heart and if it goes into a life threatening rhythm it will deliver a shock. A pace maker just sends out an electrical pulse to keep the heart beating a a certain pace. There are different settings on the pace maker that can confuse you so I will not tell you. And the AICD also can act like a pace maker. The cost depends on the brand but are usually 5-6 figures. If the doctors told her that she needs an AICD her heart is subseptable to these life threatening rhythms. Not much alternatives outside of very powerful medications that can have bad and long term side effects.