Hemodynamics, made visible.
Learn to read cardiac output, stroke volume and vascular resistance, and to act on them at the bedside. A live simulator and interactive teaching cases today, short video lessons soon, with a clinician who works with these numbers every day.
Start where you are. Finish confident at the bedside.
Five video courses, each four short lessons taken in order. Pick the track that matches your work, or jump straight to a lesson.
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Track 1 of 5Foundations
Medical students
Why blood pressure is not flow, and the three levers that set stroke volume.
4 video lessons Coming soon
- 1Flow is not pressure
- 2Preload, afterload, contractility
- 3Frank–Starling in one picture
- 4Indexing to body size
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Track 2 of 5Shock states
Residents
Tell the four kinds of shock apart from their hemodynamic fingerprint.
4 video lessons Coming soon
Open the course: Shock states -
Track 3 of 5Fluid responsiveness
ICU and emergency
Give fluid to those who will respond, and stop before it harms.
4 video lessons Coming soon
Open the course: Fluid responsiveness -
Track 4 of 5Paediatric and neonatal
Paediatric and neonatal teams
Children are not small adults: their own numbers, their own shock.
4 video lessons Coming soon
Open the course: Paediatric and neonatal -
Track 5 of 5Non-invasive monitoring
Anaesthesia and ICU
From four skin sensors to a number you can trust, and when not to.
4 video lessons Coming soon
Open the course: Non-invasive monitoring
Videos are being recorded with Dr. Nassef. Until they are ready, every lesson links to a simulator, case or page where you can practise it today.
Move the levers. Watch the circulation answer.
Change heart rate, preload, contractility and resistance, and see stroke volume, cardiac output and blood pressure respond on the Frank–Starling curve. Load a septic, hypovolemic or cardiogenic patient and try to fix them.
Illustrative monitor: sample numbers, not a live patient.
Decide first. Then see what the numbers do.
Each case gives you a patient, the hemodynamic profile and one decision. Choose, get the reasoning, and keep the teaching point.
Fever, confusion and a low blood pressure
High output, low resistance. Fluid, vasopressor or inotrope first?
Breathless, with a wet chest
Low output, high resistance, high thoracic fluid. What helps the heart?
A 28-week preterm on day two
Is the circulation coping? What the trend tells you that blood pressure can't.
From four skin sensors to a stroke volume
Electrical Cardiometry™ follows the blood in the aorta beat by beat, without a catheter. Here is the idea in four steps.
A tiny current
Four sensors on the neck and left chest send a safe, high-frequency current and measure how easily it passes.
Cells line up
Between beats, red cells in the aorta lie randomly. When the valve opens, they align with the flow and conductivity rises.
Speed of change
How fast that change happens gives the peak acceleration of aortic blood and the ejection time.
Stroke volume
From those, Osypka's patented algorithm estimates stroke volume and output; the same signal gives indices of contractility.
Dr. Yasser Nassef
A physician-scientist (MD, PhD), Assistant Professor and Research Fellow at Chung Shan Medical University in Taiwan, who has spent his career making the circulation visible. He trains clinicians across Asia and the Middle East to monitor hemodynamics non-invasively and to act on what they see, and publishes on non-invasive monitoring in septic shock, hypertension and COPD.