🫀 STROKE VOLUME, PRELOAD, AFTERLOAD & LAPLACE'S LAW — COMPLETE CARDIOVASCULAR PHYSIOLOGY REVIEW

Understanding Stroke Volume (SV), Preload, Afterload, Stroke Work, and Laplace's Law is essential for mastering cardiac physiology, hemodynamics, heart failure, hypertension, valvular heart disease, and board examinations.

📚 In This Video:

🫀 Stroke Volume (SV)
• Definition and normal values
• SV = EDV − ESV
• Relationship with Cardiac Output
• Determinants of Stroke Volume

🧠 Preload
• End-Diastolic Volume (EDV)
• Frank-Starling Mechanism
• Venous Return and Ventricular Filling
• Clinical causes of increased and decreased preload

🫀 Afterload
• Systemic Vascular Resistance (SVR)
• Mean Arterial Pressure (MAP)
• Left vs Right Ventricular Afterload
• Effects on Stroke Volume and Cardiac Output

💪 Stroke Work (SW)
• SW = SV × MAP
• Pressure-Volume Loop Interpretation
• Relationship to Myocardial Oxygen Consumption

📊 Pressure-Volume (PV) Loops
• Increased Preload
• Increased Afterload
• Increased Contractility
• Clinical Interpretation

🫀 Laplace's Law
σ = (P × r) / 2h

Learn how:
• Hypertension increases afterload
• Dilated Cardiomyopathy increases wall stress
• Ventricular Hypertrophy reduces wall stress
• Aortic Stenosis affects stroke volume
• Pulmonary Hypertension increases RV afterload

🚨 High-Yield Clinical Correlations:
✔️ Hypertension
✔️ Heart Failure
✔️ Aortic Stenosis
✔️ Dilated Cardiomyopathy
✔️ Pulmonary Hypertension
✔️ Shock States
✔️ Fluid Resuscitation

This video is perfect for:
📖 USMLE Step 1
📖 USMLE Step 2 CK
📖 COMLEX
📖 Internal Medicine Boards
📖 Nursing School
📖 PA School
📖 Medical Students
📖 Residents
📖 Cardiology Fellows

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🎓 About FEMSTARMD

FEMSTARMD is dedicated to simplifying medicine through high-yield, concept-based teaching designed for medical students, international medical graduates (IMGs), nursing students, physician assistant students, and healthcare professionals preparing for board examinations.

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⚠️ Disclaimer

The content provided on this channel is intended for educational purposes only and should not be considered medical advice. Always consult qualified healthcare professionals regarding medical decisions and patient care.

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Видео 🫀 STROKE VOLUME, PRELOAD, AFTERLOAD & LAPLACE'S LAW — COMPLETE CARDIOVASCULAR PHYSIOLOGY REVIEW канала FemStar