Ventricular Tachycardia

For sustained VT with hypotension, ischemic chest discomfort, acute heart failure, altered mental status, or other hemodynamic instability, perform synchronized electrical cardioversion promptly. If antiarrhythmic treatment precipitates hypotension or clinical deterioration during initially tolerated VT, sedate when feasible and proceed to cardioversion rather than administering sequential drugs. PubMedPubMedTeam Management of the Ventricular Tachycardia Patient - PMC - NIH

In a stable patient, obtain a 12-lead ECG during tachycardia and compare it with a baseline sinus-rhythm ECG before pharmacologic conversion. A wide-complex tachycardia is defined by QRS duration greater than 120 ms and may reflect VT, supraventricular tachycardia (SVT) with bundle-branch block or rate-related aberrancy, or pre-excitation. jaccjacc2015 ACC/AHA/HRS Guideline for the Management of Adult ... - JACC

Treat a regular monomorphic wide-complex tachycardia as VT when its mechanism remains uncertain. Misclassifying VT as SVT and administering verapamil or diltiazem can be life-threatening. jaccjacc2015 ACC/AHA/HRS Guideline for the Management of Adult ... - JACC

AV dissociation with ventricular rate faster than atrial rate establishes VT. Fusion complexes likewise establish VT because they represent simultaneous supraventricular and ventricular activation. These findings are specific but may not be visible on every tracing; actively inspect a long rhythm strip and all 12 leads. jacc+1jacc2015 ACC/AHA/HRS Guideline for the Management of Adult ... - JACCWileyVentricular Tachycardia - 2019 - Journal of Arrhythmia

Precordial concordance, with all QRS complexes in V1 through V6 either positive or negative, supports VT or pre-excitation. A QRS complex during tachycardia that is identical to baseline sinus-rhythm bundle-branch block morphology instead supports SVT with aberrant conduction. Neither comparison excludes VT in every patient. jaccjacc2015 ACC/AHA/HRS Guideline for the Management of Adult ... - JACC

Use Brugada or Vereckei-aVR algorithms to support a bedside decision, particularly when AV dissociation and fusion are absent. The Brugada approach evaluates precordial morphology, including absence of any RS complex and prolonged RS interval; the Vereckei approach emphasizes lead aVR. Meta-analysis finds high sensitivity but only moderate specificity for ECG-based wide-complex tachycardia algorithms, and many individual criteria are not diagnostic in isolation. jacc+2jacc2015 ACC/AHA/HRS Guideline for the Management of Adult ... - JACCBMJbased algorithms in wide QRS complex tachycardia: a systematic ...BMJWide complex tachycardia: differentiating ventricular ... - Heart

The Basel algorithm identifies VT when at least two of three findings are present: clinical high-risk features, time to first peak greater than 40 ms in lead II, and time to first peak greater than 40 ms in aVR. It was derived in electrophysiology-confirmed monomorphic wide-complex tachycardias, but algorithm reproducibility and emergency use remain limitations. jaccjaccSimplified Integrated Clinical and Electrocardiographic Algorithm for Differentiation of Wide QRS Complex Tachycardia: The Basel Algorithm

For hemodynamically stable monomorphic VT of unknown etiology, IV procainamide or IV amiodarone may be used, with preference for procainamide because randomized data showed a higher proportion of termination within 40 minutes and fewer major cardiac adverse events than amiodarone in tolerated wide-QRS tachycardia. PubMedPubMedPractical compendium of antiarrhythmic drugs: a clinical consensus ...

Do not use procainamide in severe structural heart disease, decompensated heart failure, acute MI, or advanced kidney disease. In those settings, choose IV amiodarone. During either infusion, monitor blood pressure continuously because hypotension can convert tolerated VT to instability requiring synchronized cardioversion. PubMed+2PubMedContemporary multidisciplinary critical care management of ... - PMCPubMedTeam Management of the Ventricular Tachycardia Patient - PMC - NIHPubMedPractical compendium of antiarrhythmic drugs: a clinical consensus ...

IV sotalol is another acute option for stable VT, and IV lidocaine is an alternative when preferred agents are unavailable. Lidocaine has lower observed termination efficacy than procainamide, amiodarone, or sotalol in comparative acute-treatment evidence. PubMed+1PubMedVentricular Tachycardia - StatPearls - NCBI BookshelfPubMedContemporary multidisciplinary critical care management of ... - PMC

When the ECG strongly suggests idiopathic outflow-tract VT, specifically left bundle-branch block morphology with an inferior axis, IV beta-blockade may terminate the arrhythmia. Ventricular arrhythmias without structural heart disease are often beta-blocker responsive; failure of drug therapy is a reason to consider catheter ablation. PubMed+1PubMedTeam Management of the Ventricular Tachycardia Patient - PMC - NIHPubMedPractical compendium of antiarrhythmic drugs: a clinical consensus ...

After a sustained VT episode, determine whether structural heart disease is present and assess left ventricular function. Reduced LVEF is a major risk discriminator; persistently reduced LVEF of 35% or less identifies patients with ischemic cardiomyopathy for whom primary-prevention ICD therapy is a class I guideline indication despite optimal medical therapy. WileyWileyContemporary updates on ventricular arrhythmias: from mechanisms to management - Bhaskaran - 2023 - Internal Medicine Journal - Wiley Online Library

In patients with nonischemic cardiomyopathy who survive sudden cardiac death due to VT or develop sustained VT without a reversible cause, implant an ICD for secondary prevention when expected survival exceeds 1 year with good functional quality of life. This decision prevents arrhythmic death but does not eliminate VT recurrence or treat the arrhythmogenic substrate. PubMed+1PubMedVentricular Tachycardia - StatPearls - NCBI BookshelfWileyContemporary updates on ventricular arrhythmias: from mechanisms to management - Bhaskaran - 2023 - Internal Medicine Journal - Wiley Online Library

Use echocardiography as the foundation for structural assessment and obtain cardiac magnetic resonance imaging when cardiomyopathy phenotype, myocardial fibrosis, or arrhythmogenic substrate requires clarification. In hypertrophic cardiomyopathy, current guidance emphasizes CMR integration because late gadolinium enhancement identifies myocardial fibrosis and improves high-risk morphologic characterization. ACCACC2020 AHA/ACC Hypertrophic Cardiomyopathy Guideline: Contemporary Management Strategies - American College of Cardiology

In a younger patient with VT and right ventricular abnormalities, consider arrhythmogenic right ventricular cardiomyopathy: supportive findings include VT with left bundle-branch block/inferior-axis morphology, T-wave inversion in V1 through V4, epsilon waves, right ventricular dilation or reduced systolic function, dyskinetic aneurysms, and delayed enhancement on CMR. WileyWileyVentricular Tachycardia - 2019 - Journal of Arrhythmia

For recurrent VT despite optimal heart-failure treatment and beta-blockade, amiodarone or sotalol may be used to reduce recurrent VT episodes. Antiarrhythmic selection should be integrated with ICD planning, because drug therapy does not replace secondary-prevention ICD therapy when sustained VT occurs without a reversible cause in eligible patients. PubMedPubMedVentricular Tachycardia - StatPearls - NCBI Bookshelf

Refer for catheter ablation when sustained ventricular arrhythmia remains refractory to medical therapy or when recurrent VT produces ICD shocks. In randomized evidence dominated by ischemic cardiomyopathy with monomorphic VT, ablation reduces VT recurrence and ICD shocks compared with medical therapy, without a clear survival benefit. PubMedPubMedContemporary multidisciplinary critical care management of ... - PMC

For coronary artery disease with recurrent symptomatic sustained monomorphic VT or recurrent ICD shocks despite chronic amiodarone, catheter ablation is recommended in preference to escalating antiarrhythmic therapy. In the VANISH trial context, ablation was superior to amiodarone dose escalation with or without mexiletine, although death, electrical storm, and appropriate ICD shock remained frequent in both groups. ACC+1ACC2022 ESC Guidelines for Ventricular Arrhythmias: Key Points - American College of CardiologyPubMedContemporary multidisciplinary critical care management of ... - PMC

Counsel patients that VT ablation is not risk-free. Reported procedure-related mortality in experienced centers is below 1%; recognized complications include vascular injury, stroke, tamponade, and AV block. Earlier secondary-prevention trials reported substantial ablation-related complications in approximately 3.8% to 5% of participants, while reducing ICD shocks and VT recurrence. PubMed+1PubMedVentricular Tachycardia - StatPearls - NCBI BookshelfPubMedAmiodarone for the treatment and prevention of ventricular fibrillation and ventricular tachycardia