Hemodynamics Lecture - Part 1

Presenter: Eddie Watson

Introduction to Hemodynamics

• Hemodynamics Definition: Movement of blood ("heme" = blood, "dynamis" = movement)
• Importance:
  • Determines tissue perfusion
  • Ensures delivery of oxygen and nutrients
  • Removes waste products

Objectives of the Lesson

• Review basic heart anatomy and blood flow
• Discuss components of hemodynamics
• Explore monitoring techniques
• Learn how to optimize patient hemodynamics

Heart Anatomy and Blood Flow

• Four Major Chambers:
  • Right Atrium
  • Right Ventricle
  • Left Atrium
  • Left Ventricle
• Flow of Blood:
  • Right atrium → Right ventricle → Lungs
  • Returns: Left atrium → Left ventricle → Rest of the body
• Heart Valves:
  • Blood moves through these valves as it passes between chambers:
    • Tricuspid Valve: Right atrium → Right ventricle
    • Pulmonic Valve: Right ventricle → Lungs
    • Mitral (Bicuspid) Valve: Left atrium → Left ventricle
    • Aortic Valve: Left ventricle → Aorta
  • Acronym to remember: TPMA (Tricuspid, Pulmonic, Mitral, Aortic)

Vessels Involved in Blood Flow

• Major Veins:
  • Superior Vena Cava: Returns blood from head and upper extremities
  • Inferior Vena Cava: Returns blood from the body
  • Coronary Sinus: Returns blood from coronary vessels
• Pulmonary Circulation:
  • Pulmonary Artery: Carries deoxygenated blood to the lungs
  • Pulmonary Veins: Return oxygenated blood to the heart

Systemic Circulation

• Aorta: Main artery distributing oxygenated blood
  • Blood can travel to the brain, upper extremities, or rest of the body
  • During diastole, blood also travels to coronary arteries

Conceptual Map of Blood Flow

• Arteries → Arterioles → Capillaries → Venules → Veins
• Understanding flow is key to determining and optimizing hemodynamics

Conclusion

• This lesson covered the anatomy of the heart and related vasculature
• Next lesson will cover oxygen delivery in hemodynamics

Note: Understanding the flow of blood and the role of different heart components and vessels is crucial for assessing and optimizing patient hemodynamics.