Atrial tachycardia https://www.ecgguru.com/taxonomy/term/59/all en An Interesting Holter Strip https://www.ecgguru.com/blog/interesting-holter-strip <div class="field field-name-field-blog-image field-type-image field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/blog/interesting-holter-strip"><img typeof="foaf:Image" src="https://www.ecgguru.com/sites/default/files/Holter.jpg" width="3022" height="1367" alt="" /></a></div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even" property="content:encoded"><p>Here you can see a long rhythm strip from a Holter ECG, written at 25 mm/s. On the left, a sinus bradyarrhythmia can be seen first, followed by an atrial tachycardia. After a few beats this changes back into a sinus bradyarrhythmia. Then follows a short VT over 3 beats, after 1 sinus node beat then a ventricular couplet. Sinus bradyarrhythmia again at the end.</p> </div></div></div> Wed, 17 Jan 2024 16:24:31 +0000 Dr A Röschl 895 at https://www.ecgguru.com SICK SINUS SYNDROME https://www.ecgguru.com/blog/sick-sinus-syndrome <div class="field field-name-field-blog-image field-type-image field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/blog/sick-sinus-syndrome"><img typeof="foaf:Image" src="https://www.ecgguru.com/sites/default/files/Ventr%20Ersatz%20Brady%20Tachy.jpg" width="3226" height="1845" alt="" /></a></div><div class="field-item odd"><a href="/blog/sick-sinus-syndrome"><img typeof="foaf:Image" src="https://www.ecgguru.com/sites/default/files/escape.jpg" width="3067" height="1849" alt="" /></a></div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even" property="content:encoded"><p>This EKG shows the classic features of sick sinus syndrome. Initially, there is an accelerated atrial rhythm/atrial tachycardia. After a pre-automatic pause of 2609 ms, a ventricular premature beat occurs, followed by a junctional escape rhythm. Pre-automatic pause is a pause after a tachycardia and before an automatic rhythm, like sinus rhythm or, in this case, junctional escape rhythm. Therefore, there is an alternation between tachycardic phases and very bradycardic rhythms, the classic bradycardia/tachycardia syndrome. Paper speed is 12.5 mm/sec.</p></div></div></div> Tue, 29 Aug 2023 06:31:17 +0000 Dr A Röschl 868 at https://www.ecgguru.com Supraventricular Tachycardia With Wenckebach Conduction https://www.ecgguru.com/ecg/supraventricular-tachycardia-wenckebach-conduction <div class="field field-name-field-ecg field-type-image field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/ecg/supraventricular-tachycardia-wenckebach-conduction"><img typeof="foaf:Image" src="https://www.ecgguru.com/sites/default/files/Wenckebach%20ST.jpg" width="1800" height="1013" alt="" /></a></div><div class="field-item odd"><a href="/ecg/supraventricular-tachycardia-wenckebach-conduction"><img typeof="foaf:Image" src="https://www.ecgguru.com/sites/default/files/RS%20Laddergram%20cropped.jpg" width="800" height="219" alt="" /></a></div></div></div><div class="field field-name-field-ecg-interpretation field-type-text-long field-label-hidden"><div class="field-items"><div class="field-item even"><p class="MsoNormal"><span style="font-size: 12.0pt; line-height: 107%;">This ECG was obtained from a patient in a walk-in health clinic.  We do not have any other information on the patient.  We thank Joe Kelly for donating this interesting ECG to the GURU.</span><span style="font-size: 8pt; line-height: 107%;"> </span></p><p class="MsoNormal"><strong><span style="font-size: 12.0pt; line-height: 107%;">IRREGULAR RHYTHM    </span></strong><span style="font-size: 12pt; line-height: 107%;">If you march out the P waves, you will see that they are regular, at a rate of approximately 130 bpm.</span><span style="font-size: 12pt; line-height: 107%;">  </span><span style="font-size: 12pt; line-height: 107%;">But the QRS complexes are not regular, and there are fewer QRS complexes than P waves.</span><span style="font-size: 12pt; line-height: 107%;"> </span><span style="font-size: 8pt; line-height: 107%;"> </span></p><p class="MsoNormal"><strong><span style="font-size: 12.0pt; line-height: 107%;">WENCKEBACH CONDUCTION   </span></strong><span style="font-size: 12pt; line-height: 107%;">Looking closely at the PR intervals, you will notice that they progressively prolong.</span><span style="font-size: 12pt; line-height: 107%;">  </span><span style="font-size: 12pt; line-height: 107%;">This “pushes” the QRS complexes progressively toward the right.</span><span style="font-size: 12pt; line-height: 107%;">  </span><span style="font-size: 12pt; line-height: 107%;">Eventually, the T wave – and the refractory period – will land on the next P wave.</span><span style="font-size: 12pt; line-height: 107%;">  </span><span style="font-size: 12pt; line-height: 107%;">That P wave will be unable to conduct to the wave, and no T wave of course, so the next P wave will conduct with a shorter PR interval.</span></p><p class="MsoNormal"><span style="font-size: 12.0pt; line-height: 107%;">We are including a short rhythm strip from this patient, with conduction marked with a <a href="http://ecgguru.com/blog/are-you-new-laddergrams">laddergram.</a></span><span style="font-size: 8pt; line-height: 107%;"> </span></p></div></div></div> Thu, 17 Mar 2016 04:55:46 +0000 Dawn 692 at https://www.ecgguru.com Atrial Flutter With 2:1 Conduction https://www.ecgguru.com/ecg/atrial-flutter-21-conduction <div class="field field-name-field-ecg field-type-image field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/ecg/atrial-flutter-21-conduction"><img typeof="foaf:Image" src="https://www.ecgguru.com/sites/default/files/AFL%20101.jpg" width="1799" height="1504" alt="" /></a></div></div></div><div class="field field-name-field-ecg-interpretation field-type-text-long field-label-hidden"><div class="field-items"><div class="field-item even"><p>Unfortunately, we have no clinical information on this patient, not even age or gender, as the ECG machine defaults to "Age 60". &nbsp;The rhythm is a supraventricular tachycardia at a rate of about 260/min. with 2:1 conduction, resulting in a heart rate of about 130 / minute. &nbsp;Some would call this atrial tachycardia, and some atrial flutter. &nbsp;Since the reentrant pathways involved in the two rhythms are different, it is probable that an electrophysiologist could determine the exact location of the pathway in the EP lab. &nbsp;Without benefit of this test, we use our best guess. &nbsp;We will leave it to our more advanced Gurus to debate the origins of this rhythm.</p><p>The fast P waves are best observed in the limb leads, with one P wave occuring in the QRS complex. &nbsp;If you ignore the QRS complexes for a moment, you can draw an unbroken line through them, uncovering the flutter waves. &nbsp;SVTs with 2:1 conduction can easily be mistaken for sinus tachycardia. &nbsp;Always suspect and look for atrial flutter when the heart rate is around 150 / minute. &nbsp;A 12-lead is a big help, as flutter waves show up better in some leads than in others. &nbsp;Another way to uncover atrial flutter is to slow the rate with vagal maneuvers or medication to decrease the conduction ratio, and observe several flutter waves in a row without QRS complexes.</p><p>Of even more concern to this patient may be the ST elevations - slight but noticeable - in Leads V2 - V4, and possibly I and aVL. &nbsp;The J points (the beginning point of the ST segment) can be obscurred by the P wave lying beneath the QRS, and it may be difficult to judge ST elevations.</p><p>We expect this ECG to elicit many opinions - possibly different from ours. &nbsp;Please add your comments below. &nbsp;We will enjoy the discussion.</p></div></div></div> Sat, 05 Oct 2013 05:07:15 +0000 Dawn 502 at https://www.ecgguru.com Jason's Blog: ECG Challenge of the Week for Sept. 2-9. https://www.ecgguru.com/blog/jasons-blog-ecg-challenge-week-sept-2-9 <div class="field field-name-field-blog-image field-type-image field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/blog/jasons-blog-ecg-challenge-week-sept-2-9"><img typeof="foaf:Image" src="https://www.ecgguru.com/sites/default/files/ECG%20of%20the%20Week%201k%20answer.png" width="765" height="514" alt="" /></a></div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even" property="content:encoded"><p> </p></div></div></div> Sun, 02 Sep 2012 01:44:45 +0000 jer5150 322 at https://www.ecgguru.com