{"id":8297,"date":"2025-08-09T12:14:16","date_gmt":"2025-08-09T09:14:16","guid":{"rendered":"https:\/\/jordan-cardiac.org\/?p=8297"},"modified":"2025-08-09T12:14:16","modified_gmt":"2025-08-09T09:14:16","slug":"ecg-interpretation-summary-ecg-challenge-heart-patient-with-a-racing-pulse","status":"publish","type":"post","link":"https:\/\/jordan-cardiac.org\/en\/ecg-interpretation-summary-ecg-challenge-heart-patient-with-a-racing-pulse\/","title":{"rendered":"ECG Interpretation Summary: ECG Challenge-Heart Patient With a Racing Pulse"},"content":{"rendered":"
ECG Interpretation Summary: ECG Challenge-Heart Patient With a Racing Pulse<\/div>\n
<\/div>\n
Published on: Medscape, July 18, 2025<\/div>\n
<\/div>\n
Key Points \u2013 Numbered Summary<\/div>\n
1. Heart Rhythm:<\/span><\/div>\n
\u2022 Regular rhythm at a tachycardic rate of 132 bpm<\/span><\/div>\n
2. QRS Morphology:<\/span><\/div>\n
\u2022 Wide QRS complex (duration: 0.16 sec)<\/span><\/div>\n
\u2022 QRS has an RBBB-like appearance, especially a broad tall R wave in lead V1<\/span><\/div>\n
\u2022 However, this morphology is not typical for standard right bundle branch block (RBBB)<\/span><\/div>\n
3. QRS Axis:<\/span><\/div>\n
\u2022 Extreme left axis deviation<\/span><\/div>\n
\u2022 Seen as positive QRS in lead I and negative in leads II and aVF<\/span><\/div>\n
4. P Waves and AV Dissociation:<\/span><\/div>\n
\u2022 Occasional P waves are seen, but they are not consistently associated with QRS complexes<\/span><\/div>\n
\u2022 This confirms AV dissociation, a classic feature of ventricular tachycardia (VT)<\/span><\/div>\n
5. ST-T Wave Changes:<\/span><\/div>\n
\u2022 Subtle changes in ST-T segments are present, which may reflect:<\/span><\/div>\n
\u2022 Abnormal ventricular activation<\/span><\/div>\n
\u2022 Superimposed atrial activity (P waves)<\/span><\/div>\n
6. QT\/QTc Intervals:<\/span><\/div>\n
\u2022 Prolonged at 380\/560 msec<\/span><\/div>\n
\u2022 But when corrected for the widened QRS, adjusted QT\/QTc becomes 300\/445 msec, which is considered normal<\/span><\/div>\n
7. Differential Diagnosis Consideration:<\/span><\/div>\n
\u2022 Though the QRS and axis could suggest fascicular VT (originating from the left posterior fascicle),<\/span><\/div>\n
\u2022 The presence of coronary artery disease (CAD) and prior MI makes scar-related reentry VT more likely<\/span><\/div>\n
8. Final Diagnosis:<\/span><\/div>\n
Ventricular Tachycardia (VT)<\/div>\n
Supported by:<\/div>\n
\u2022 Wide QRS<\/span><\/div>\n
\u2022 AV dissociation<\/span><\/div>\n
\u2022 Extreme axis deviation<\/span><\/div>\n
\u2022 History of structural heart disease<\/span><\/div>\n
9. Peer Response:<\/span><\/div>\n
\u2022 56% of respondents correctly identified the rhythm as ventricular tachycardia<\/span><\/div>\n
\u2022 Other less likely choices included:<\/span><\/div>\n
\u2022 Sinus tachycardia with RBBB (13%)<\/span><\/div>\n
\u2022 AV reentrant tachycardia (AVRNT) with RBBB (16%)<\/span><\/div>\n
10\u2022 The key difference between ventricular tachycardia (VT) and supraventricular tachycardia (SVT) with aberrant conduction lies in their origin and ECG features. In this case, VT is favored due to several hallmark findings:<\/div>\n
\u2022 AV dissociation, where P waves are not linked to QRS complexes, strongly supports VT and essentially excludes SVT.<\/span><\/div>\n
\u2022 The QRS morphology, while resembling RBBB, is atypical and more consistent with abnormal ventricular activation.<\/span><\/div>\n
\u2022 An extreme left axis deviation, uncommon in SVT but typical in VT, especially with prior MI or structural heart disease, further supports VT.<\/span><\/div>\n
\u2022 Additional features such as ST-T changes, subtle QRS variation, and prolonged QTc all point to a ventricular origin.<\/span><\/div>\n
<\/div>\n
In contrast, SVT with aberrancy typically shows regular PR intervals, consistent bundle branch block patterns, and occurs in patients without significant heart disease.<\/div>\n
<\/div>\n
Thus, this ECG represents classic scar-related reentrant VT, not SVT with aberrant conduction.<\/div>\n
<\/div>\n
https:\/\/click.mail.medscape.com\/?qs=a3df51ac99f910bba510d364f67d82381decaef74b1f3169eec781d06dfb7df19a36f0623a0402bea1ab789668d44d02c010fb9de57a5e0fcbef3dd0836d76d9<\/div>\n","protected":false},"excerpt":{"rendered":"

ECG Interpretation Summary: ECG Challenge-Heart Patient With a Racing Pulse Published on: Medscape, July 18, 2025 Key Points \u2013 Numbered Summary 1. Heart Rhythm: \u2022 Regular rhythm at a tachycardic rate of 132 bpm 2. QRS Morphology: \u2022 Wide QRS complex (duration: 0.16 sec) \u2022 QRS has an RBBB-like appearance, especially a broad tall R […]<\/p>\n","protected":false},"author":145,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-8297","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/jordan-cardiac.org\/en\/wp-json\/wp\/v2\/posts\/8297","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jordan-cardiac.org\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jordan-cardiac.org\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jordan-cardiac.org\/en\/wp-json\/wp\/v2\/users\/145"}],"replies":[{"embeddable":true,"href":"https:\/\/jordan-cardiac.org\/en\/wp-json\/wp\/v2\/comments?post=8297"}],"version-history":[{"count":1,"href":"https:\/\/jordan-cardiac.org\/en\/wp-json\/wp\/v2\/posts\/8297\/revisions"}],"predecessor-version":[{"id":8298,"href":"https:\/\/jordan-cardiac.org\/en\/wp-json\/wp\/v2\/posts\/8297\/revisions\/8298"}],"wp:attachment":[{"href":"https:\/\/jordan-cardiac.org\/en\/wp-json\/wp\/v2\/media?parent=8297"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jordan-cardiac.org\/en\/wp-json\/wp\/v2\/categories?post=8297"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jordan-cardiac.org\/en\/wp-json\/wp\/v2\/tags?post=8297"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}