In this episode of Whiteboard Medicine, we break down the fundamentals of arterial line monitoring and how to interpret the arterial pressure waveform at the bedside. Arterial lines are one of the most powerful tools for managing critically ill patients in the ICU, emergency department, and operating room, but accurate interpretation requires understanding the underlying hemodynamic physiology. In this episode we walk through how arterial lines are placed, the key components of the normal arterial waveform, and how clinicians can use pulse pressure variation (PPV) to assess fluid responsiveness in mechanically ventilated patients. Whether you are managing shock, titrating vasopressors, or evaluating hemodynamic instability, understanding arterial waveform physiology is essential for bedside decision making in critical care. Topics covered in this episode include: • Fundamentals of arterial line placement • Components of the normal arterial waveform • Systolic upstroke, dicrotic notch, and diastolic runoff • Causes of abnormal arterial waveforms • Pulse pressure variation (PPV) explained • Using PPV to assess fluid responsiveness • Practical bedside interpretation for ICU clinicians Watch the full video version of this episode here: https://www.youtube.com/watch?v=jocAWm7RPig 📚 Download the PDF study guide for this video: 👉 https://www.patreon.com/c/WhiteBoardMedicine Patreon members get access to mini-courses, study guides, practice questions, ad-free videos, and in-depth educational discussions designed for emergency and critical care clinicians. Disclaimer: Whiteboard Medicine content is for educational purposes only and is intended for healthcare professionals and trainees. This content should not be considered medical advice and should not replace clinical judgment, institutional protocols, or consultation with qualified medical professionals.

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