Seeing blood clots before they strike

A lightning-fast microscope paired with AI now lets scientists watch platelets form clots in real time, all from a simple arm draw. The technique flagged higher platelet clumping in acute-symptom heart patients and showed that arm blood mirrors coronary arteries, pointing to a future where cardiologists tweak antiplatelet drugs without catheters and guesswork—ushering in safer, tailor-made care.