https://ecgvn.com/en/tags/atrial-depolarisation/ Recent content in Atrial Depolarisation on ECG Library – LITFL Basics Hugo en-us Sat, 29 Jan 2022 00:00:00 +0000 https://ecgvn.com/en/posts/p-wave/ Sat, 29 Jan 2022 00:00:00 +0000 https://ecgvn.com/en/posts/p-wave/ <h5 id="p-wave-overview"><strong>P Wave Overview</strong></h5> <p>The P wave is the first positive deflection on the ECG and represents <strong>atrial depolarisation.</strong></p> <ul> <li>The P wave is the first positive deflection on the ECG</li> <li>It represents <strong>atrial depolarisation</strong></li> <li>Normal duration: &lt; 0.12 s (&lt; 120ms or 3 small squares)</li> </ul> <p><a href="https://litfl.com/wp-content/uploads/2018/10/ECG-waves-segments-and-intervals-LITFL-ECG-library-3.jpg"><img alt="ECG basics: waves, segments and intervals LITFL ECG library" loading="lazy" src="https://litfl.com/wp-content/uploads/2018/10/ECG-waves-segments-and-intervals-LITFL-ECG-library-3.jpg"></a></p> <h4 id="characteristics-of-the-normal-sinus-p-wave">Characteristics of the Normal Sinus P Wave</h4> <p><strong>Morphology</strong></p> <ul> <li>Smooth contour</li> <li><em>Monophasic</em> in lead II</li> <li><em>Biphasic</em> in V1</li> </ul> <p><strong>Axis</strong></p>