Pressure rises. Volume does not.

Pressure rises. Volume does not. Can ventricular pressure rise while volume stays unchanged? Yes: during isovolumetric contraction, the inlet and outlet valves are closed. The phase ends when the outlet valve opens as the pressure relationship permits ejection. This original schematic is a normal left-ventricular teaching model, not a clinical pressure trace. Silent caption-led lesson with original diagrams; no narration or music. Sources: OpenStax A&P 2e §19.3: https://openstax.org/books/anatomy-and-physiology-2e/pages/19-3-cardiac-cycle Original AI-assisted educational content; AI source review: 16 October 2026. No clinician certification is claimed. Sketch the two closed-valve phases before checking a cardiac-cycle diagram. https://meyshan.com/app/recall?utm_source=meyshantube&utm_medium=video&utm_campaign=student_daily_202610&utm_content=d23_c #MedicalStudents #MedicalEducation #ActiveRecall Transcript: on-screen text from this silent video; no spoken narration.