https://ecgvn.com/en/tags/left-axis-deviation/ Recent content in Left Axis Deviation on ECG Library – LITFL Basics Hugo en-us Sun, 17 Nov 2024 00:00:00 +0000 https://ecgvn.com/en/posts/ecg-axis-interpretation/ Sun, 17 Nov 2024 00:00:00 +0000 https://ecgvn.com/en/posts/ecg-axis-interpretation/ <p><strong>Cardiac axis</strong> represents the sum of depolarisation vectors generated by individual cardiac myocytes. Clinically is is reflected by the ventricular axis, and interpretation relies on determining the relationship between the QRS axis and limb leads of the ECG (below diagram)</p> <p>Since the left ventricle makes up most of the heart muscle under normal circumstances, normal cardiac axis is directed downward and slightly to the left:</p> <ul> <li><strong>Normal Axis</strong> = QRS axis between -30° and +90°.</li> </ul> <p>Abnormal axis deviation, indicating underlying pathology, is demonstrated by:</p> https://ecgvn.com/en/posts/left-axis-deviation-lad/ Tue, 08 Oct 2024 00:00:00 +0000 https://ecgvn.com/en/posts/left-axis-deviation-lad/ <h4 id="left-axis-deviation-lad">Left Axis Deviation LAD</h4> <p><strong>Left Axis Deviation</strong> = QRS axis less than -30°.</p> <ul> <li><strong>Normal Axis</strong> = QRS axis between -30° and +90°</li> <li><strong>Right Axis Deviation</strong> = QRS axis greater than +90°</li> <li><strong>Extreme Axis Deviation</strong> = QRS axis between -90° and 180° (AKA “Northwest Axis”)</li> </ul> <hr> <p><strong>Hexaxial Reference System</strong></p> <p><img alt="Haxaxial ECG AXIS Reference 2021" loading="lazy" src="https://litfl.com/wp-content/uploads/2018/08/Haxaxial-ECG-AXIS-Reference-2021-1024x986.png"></p> <p><a href="https://litfl.com/ecg-axis-interpretation/">Hexaxial Reference System</a> – relationship between QRS axis and frontal leads of the ECG.</p> <hr> <h4 id="how-to-recognise-left-axis-deviation">How to recognise left axis deviation</h4> <h5 id="three-lead-analysis">Three Lead analysis</h5> <ul> <li>QRS is POSITIVE (dominant R wave) in Lead I</li> <li>QRS is NEGATIVE (dominant S wave) in leads II, III and aVF</li> </ul> <p><img alt="Lead I II aVF Hexaxial Evaluation LAD Pathological 2021" loading="lazy" src="https://litfl.com/wp-content/uploads/2018/08/Lead-I-II-aVF-Hexaxial-Evaluation-LAD-Pathological-2021-1024x464.png"><img alt="Lead I II aVF Hexaxial Evaluation LAD Pathological 2021" loading="lazy" src="https://litfl.com/wp-content/uploads/2018/08/Lead-I-II-aVF-Hexaxial-Evaluation-LAD-Pathological-2021-1024x464.png"></p> https://ecgvn.com/en/posts/cardiac-axis-trainer/ Tue, 10 May 2022 00:00:00 +0000 https://ecgvn.com/en/posts/cardiac-axis-trainer/ <p>Learning cardiac axis interpretation can be tedious.</p> <p>I have created an open source webapp hosted on <a href="http://cardiacaxis.com">CardiacAxis.com</a>. Here you will be able to analyse in English and German the ECG variations with axis deviation.</p> <p>The Axis trainer online is <em>interactive</em> and the arrow can be moved to demonstrate each of the specific QRS complex changes. Bookmark to your phone homepage and try it out for yourself. Below is a quick demonstration through 360 degrees…</p> https://ecgvn.com/en/posts/super-axis-man-sam/ Tue, 03 Nov 2020 00:00:00 +0000 https://ecgvn.com/en/posts/super-axis-man-sam/ <p><a href="https://litfl.com/ecg-library/basics/">↪  ECG Basics Homepage</a></p> <hr> <h3 id="who-is-sam">Who is SAM?</h3> <p>As a routine part of ECG analysis, we need to determine the <a href="https://litfl.com/ecg-axis-interpretation/">ECG AXIS</a>. It isn’t really enough to just whimper… “Is it <em>normal?</em>” So, to help understand axis a tiny bit…I need to introduce you to <strong>SAM</strong> – the <strong>S</strong>uper <strong>A</strong>xis <strong>M</strong>an</p> <hr> <h4 id="building-sam--the-super-axis-man">Building SAM – the Super Axis Man</h4> <h5 id="1-draw-a-circle-and-put-sams-head-on-the-top">(1) Draw a circle and put SAMs head on the top.</h5> <p><em>Note:</em> SAM is smiling today because he is learning something…</p>