Master 99 core topics, one card at a time.

• Find exactly what you need: Browse topics by body system or use the global search to scan the full text.
• Color-coded structure: Every card opens with a clear outline, using colors to visually separate definitions, etiologies, mechanisms, classifications, and clinical pictures.
• Study your way: Toggle on Cram mode to strip the text down to just high-yield facts, or use Unread only to hide what you’ve already conquered.
• Dive deeper instantly: Click any underlined step in a mechanism to pull up its definition, causes, and consequences right alongside your main text.
• Never lose your place: PathoSphere remembers exactly how far you read. Just hit Continue to jump back in right where you left off.

Every mechanism mapped out, step by step.

• Tree View: Focus on one step at a time. Expand causes to the left and consequences to the right, unpacking the chain level by level.
• Map View: Step back and see the big picture with entire topics laid out visually at once.
• Spot the intersections: See a +N badge on a step? That means N other topics pass through it, showing you exactly where different pathologies overlap.
• Crossroads: Discover the highest-yield connections by browsing the steps shared by the most diseases.
• Always in context: Click any step in a mechanism to jump straight back to the exact sentence in your reading where it came from.

ECG Plus: Real cases, completely unpacked.

• A consistent 10-step approach: We break down every case using the same 10 steps, highlighting each finding directly on the tracing so you see exactly what to look for.
• Study vs. Practice: Learn the ropes in Study mode with the full reading visible, or switch to Practice mode to hide the diagnosis and test yourself.
• Interactive tools: Don’t just look at a static image. Zoom in, isolate single leads, and measure intervals yourself using built-in digital calipers.
• Animated Theory: Connect the paper to the patient. Watch animations that show exactly what the physical heart is doing to create specific ECG patterns.

Nail the final exam: Know exactly what your examiners expect.

• Real questions, reliable answers: See the exact questions asked at finals, paired with answers written in the same clear style as your main study notes.
• Two-way integration: Exam topics link directly back to the core Theory. Likewise, when you’re reading a Theory card, an Asked at Finals section highlights exactly what you need to memorize.