Wolff-Parkinson-White syndrome https://www.ecgguru.com/taxonomy/term/348/all en Supraventricular Tachycardia in Pediatric Patient With Wolff-Parkinson-White Syndrome https://www.ecgguru.com/ecg/supraventricular-tachycardia-pediatric-patient-wolff-parkinson-white-syndrome <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-pediatric-patient-wolff-parkinson-white-syndrome"><img typeof="foaf:Image" src="https://www.ecgguru.com/sites/default/files/13M%20SVT%20WPW%20ECG2%20don%27t%20know%20time.jpg" width="1800" height="1141" alt="" /></a></div><div class="field-item odd"><a href="/ecg/supraventricular-tachycardia-pediatric-patient-wolff-parkinson-white-syndrome"><img typeof="foaf:Image" src="https://www.ecgguru.com/sites/default/files/image_2.jpg" width="1800" height="1141" 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" style="margin-bottom: .0001pt; line-height: normal;">This ECG was obtained from a 13-year-old boy who had previously been in NSR.  At that time, he was diagnosed with <a href="http://ecgguru.com/ecg/wolff-parkinson-white-syndrome-0">Wolff-Parkinson-White syndrome</a>, and he had delta waves.  He now presents with a supraventricular tachycardia.  People with W-P-W have one or more accessory pathways which allow atrial impulses to bypass the AV node and “pre-excite” the ventricles.  An accessory pathway, along with the normal pathway through the AV node, can form a functional circuit, allowing conduction to proceed down one pathway and return up the other, in a rapidly repeating circular motion.  This causes paroxysmal supraventricular tachycardia.<span style="font-size: 8pt;"> </span></p><p class="MsoNormal" style="margin-bottom: .0001pt; line-height: normal;"><span style="font-size: 8pt;"><br /></span></p><p class="MsoNormal" style="margin-bottom: .0001pt; line-height: normal;">In W-P-W, the most common type of SVT is AV reciprocating tachycardia (AVRT), also called AV reentry tachycardia.  Conduction through the accessory pathway can be forward (anterograde) or backward (retrograde).  The most common type of reentrant conduction in W-P-W is <strong>ORTHODROMIC</strong>, which we see here.  The impulse conducts forward through the AV node, and backward over the accessory pathway.  There is no delta wave, as there is no pre-excitation of the ventricles.<span style="font-size: 8pt;"> </span></p><p class="MsoNormal" style="margin-bottom: .0001pt; line-height: normal;"><span style="font-size: 8pt;"><br /></span></p><p class="MsoNormal" style="margin-bottom: .0001pt; line-height: normal;"><strong>Features of orthodromic AVRT are: </strong></p><p class="MsoNormal" style="margin-bottom: .0001pt; line-height: normal;"><span style="font-size: 13.008px;">Fast rate (usually approximately 140-250 beats per minute)    </span></p><p class="MsoNormal" style="margin-bottom: .0001pt; line-height: normal;"><span style="font-size: 13.008px;">Narrow QRS complexes (unless BBB or IVCD present)   </span></p><p class="MsoNormal" style="margin-bottom: .0001pt; line-height: normal;"><span style="font-size: 13.008px;">P waves retrograde, if seen (negative in II, positive in aVR and V1)  </span></p><p class="MsoNormal" style="margin-bottom: .0001pt; line-height: normal;"><span style="font-size: 13.008px;">ST depression and T wave inversion common.</span><span style="font-size: 13.008px; line-height: 1.538em;"> </span></p><p class="MsoNormal" style="margin-bottom: .0001pt; line-height: normal;"><span style="font-size: 13.008px; line-height: 1.538em;"><br /></span></p></div></div></div> Tue, 01 Dec 2015 17:34:39 +0000 Dawn 679 at https://www.ecgguru.com Wolff-Parkinson-White Syndrome https://www.ecgguru.com/ecg/wolff-parkinson-white-syndrome-0 <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/wolff-parkinson-white-syndrome-0"><img typeof="foaf:Image" src="https://www.ecgguru.com/sites/default/files/PreEx%20WPW.jpg" width="1800" height="1245" 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">Here is a good example of an ECG showing the signs of Wolff-Parkinson-White syndrome during normal sinus rhythm.&nbsp; WPW is one of the “pre-excitation” syndromes caused by an accessory pathway between the atria and ventricles. Accessory pathways can bypass the AV node.&nbsp; These conduction pathways can conduct anterograde (forward toward the ventricles), retrograde (away from the ventricles), most commonly, in both directions.&nbsp; When the accessory pathway conducts in an anterograde fashion, it causes pre-excitation of the ventricles. See <a title="WPW conduction C Watford" href="http://ecgguru.com/heart-illustrations/accessory-pathway-conduction-compared-normal-conduction"><span style="color: #0070c0;">Illustration</span></a>.</p><p class="MsoNormal">Wolff-Parkinson-White syndrome is caused by an accessory pathway called the Bundle of Kent, which can occur on either the left or the right side of the heart.&nbsp; The ECG sign of the pre-excitation of the ventricles in WPW is a <strong>DELTA WAVE</strong>. &nbsp;The delta wave is seen in normal sinus rates when the accessory pathway conducts anterograde, pre-exciting the ventricles. The delta wave arises at the end of the P wave, eliminating the PR segment in some leads.&nbsp; In this ECG, the delta waves can best be seen in Leads I, II, aVR, and aVL, as well as in V1, V2, and V3.&nbsp;</p><p class="MsoNormal">People with WPW are prone to bouts of supraventricular tachycardia, called AV reentrant tachycardia (AVRT).&nbsp; A circular pathway can form between the normal AV pathways and the accessory pathway, causing an impulse to depolarize the ventricles and return to the atria in a rapidly repeating cycle, causing a paroxysmal supraventricular tachycardia. The delta waves will disappear as they become part of the reentrant cycle.</p><p class="MsoNormal">Tachyarrhythmias can also form when impulses from atrial flutter or <a title="Pre-excited a fib Jason Roediger" href="http://ecgguru.com/blog/jasons-blog-ecg-challenge-week-dec-16th-23rd"><span style="color: #0070c0;">atrial</span> <span style="color: #0070c0;">fibrillation</span></a> rapidly enter the ventricles through the accessory pathway without the filtering effect of the AV node.&nbsp; The extremely rapid rates produced in these situations can quickly lead to deterioration and ventricular fibrillation.</p><p>&nbsp;</p><p class="MsoNormal">For more information on WPW ECG signs, we recommend <span style="color: #0070c0;"><a title="WPW Life in the Fast lane" href="http://lifeinthefastlane.com/ecg-library/pre-excitation-syndromes/">Life In The Fast Lane</a>.&nbsp;</span></p></div></div></div> Wed, 21 Oct 2015 04:05:28 +0000 Dawn 671 at https://www.ecgguru.com Jason's Blog: ECG Challenge of the Week for Dec. 16th - 23rd. https://www.ecgguru.com/blog/jasons-blog-ecg-challenge-week-dec-16th-23rd <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-dec-16th-23rd"><img typeof="foaf:Image" src="https://www.ecgguru.com/sites/default/files/ECG%20of%20the%20Week%201x.png" width="765" height="561" alt="" /></a></div><div class="field-item odd"><a href="/blog/jasons-blog-ecg-challenge-week-dec-16th-23rd"><img typeof="foaf:Image" src="https://www.ecgguru.com/sites/default/files/ECG%20of%20the%20Week%201x%20SR.png" width="765" height="519" 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>Found this "gem" buried deep-down in the back of the vault and have wanted to share it for many months.  Due to the impressive QRS voltage and overlapping waveforms, I initially debated on whether or not I should post this at 1/2-standard but in the end I decided to retain its original size.  This ECG is from 27 years ago so I have very limited information, but this is what I do know. <br /></p></div></div></div> Sat, 15 Dec 2012 17:54:09 +0000 jer5150 380 at https://www.ecgguru.com