Honestly I'm circumspect about the market size. I am curious about this stock, and haven't made a decision yet in either direction. One the one hand, I don't particularly see diagnostic uncertainty amongst cardiologists (or more correctly - their extremely well-trained echo technicians). Severe AS is not an occult finding.
On the other, heart failure is a huge market, and diastolic heart failure is the most significant under-diagnosed sub-type (not yet addressed by EIQ). And very intelligent physiologists and software engineers would (hopefully) not be wasting their time on a solution in search of a problem.
My early hypothesis is that the value proposition of EIQ is not being meaningfully "better" at diagnosis, but "faster and cheaper". Such may make full echo studies faster by the sonographers (who take years to train), meaning they can get more studies (and revenue( done per unit time, or formal reporting by a cardiologist faster (More reports per unit time).
There may be edge cases where an echo diagnosis can be made that would otherwise be missed, but realistically most of these diagnoses can be made on clinical grounds. I dont think EIQ will find more heart failure, but it may make it cheaper and faster to diagnose
TL;DR: not sure yet, likely positive value for users, probably will take a small position IRL and SM, will probably save cardiologists' money rather than save lives