Sure, a scientist can get a pretty good handle on that “flutter.” We use an ECG to record the heart’s electrical activity, and from that we can calculate the time between each beat. The variability of those intervals—what you’re describing as flutter—can be quantified with metrics like SDNN or RMSSD. For even finer detail you can add photoplethysmography to track pulse wave changes or speckle‑tracking echocardiography to see subtle motion. In short, the secret is in the data, and the right tools let us read it.