12-Lead ECG Interval Interpretation | PR, QRS, QT & QTc Explained
Understanding ECG intervals (PR, QRS, QT, and QTc) is essential for accurate interpretation and patient safety. In this video, we walk through how to identify each interval on a 12-lead ECG, what the normal ranges are, and how to recognize when they’re prolonged or abnormal. We also break down how to calculate corrected QT (QTc) and discuss common pitfalls that often trip up clinicians in the field.
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By the end of this video, you will have a clearer framework for analyzing ECG intervals, applying them in different clinical contexts (ICU, ER, ward), and distinguishing normal versus pathological findings. This is especially helpful for medical students, residents, nurses, and anyone sharpening their ECG skills.
If you found this useful, be sure to explore our other ECG tutorials on rate, axis, ischemia, and systematic interpretation. Share this video with your peers and trainees — mastering ECG intervals can be a game changer in clinical decision making.
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DISCLAIMER THIS VIDEO DOES NOT PROVIDE MEDICAL ADVICE. The information, including but not limited to, text, graphics, images and other material contained on this website are for informational purposes only. No material on this site is intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of your physician or other qualified health care provider with any questions you may have regarding a medical condition or treatment and before undertaking a new health care regimen, and never disregard professional medical advice or delay in seeking it because of something you have read, watched, or listened to on this video, or any other videos, reports, texts tweets or other sources.
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