Overview
A normal visit begins at a welcoming choice rather than dropping a new learner into disease. Start with public Foundations for three short lessons, choose Practice for the difficulty hub, or open the full Lab when you are ready to build a free-form comparison.
Foundations uses the live synthetic simulator but resets each activity to a clean normal reference. The lessons cover the circulation route, pressure versus forward flow, and ECG electrical timing. They are education, not patient measurements, diagnosis, treatment advice or validated patient forecasts.
Direct full-Lab links using ?lab=1 and existing case links using cases=1 or supported hash controls bypass the welcome so saved teaching workflows still open where intended.