mavii

Monomorphic VT: This ECG is a difficult one! Although there is a broad complex tachycardia (HR > 100, QRS > 120), the appearance in V1 is more suggestive of SVT with aberrancy, given that the the complexes are not that broad (< 160 ms) and the right rabbit ear is taller than the left; However, on closer inspection there are signs of AV dissociation, with superimposed P waves visible in V1

Regardless of etiology and ECG, ventricular tachycardia is always a potentially life-threatening arrhythmia that requires immediate attention. The ventricular rate is typically very high (100–250 beats per minute) and cardiac output is affected (i.e reduced) in virtually all cases. ... Individuals with reduced left ventricular function (e.g ...

The tachycardia's QRS morphology on surface electrocardiogram (ECG) predicts the site of origin and is commonly classified as right ventricular tachycardia or left ventricular tachycardia. Patients generally tolerate the tachycardia and sudden cardiac death is rare in this patient population.

Kamakura S., Shimizu W., Matsuo K. et al. Localization of optimal ablation site of idiopathic ventricular tachycardia from right and left ventricular outflow tract by body surface ECG. Circulation, 1998. 98: 1525. Hachiya H., Aonuma K., Yamauchi Y. et al. Electrocardiographic characteristic of left ventricular outflow tract tachycardia.

Idiopathic fascicular left ventricular tachycardia (IFLVT) is the most common IVT of the left ventricle and represents the 10-15% of all IVT. ... Its ECG pattern typically shows RBBB morphology and right axis. The earliest activation has been described in the anterolateral wall of the left ventricle (18). Upper septal fascicular ventricular ...

Idiopathic left ventricular tachycardia (ILVT) is also known as fascicular or “verapamil-responsive” VT. ... Successful ablation was performed by transecting the left posterior fascicle. The ECG characteristics of VT related to anatomic variants including FTs are highly varied but can often be deduced from the location of these structures ...

Reported interval and morphological ECG criteria for identifying a left ventricular epicardial (EPI) ventricular tachycardia (VT) site of origin are assessed by 2 different observers for a fast (A) and a slow (B) VT. Of note, for the fast VT, the QRS onset is defined differently, affecting the measurement of all the interval criteria.

Ventricular Tachycardia. Ventricular Tachycardia (VT) is a ventricular rhythm with a frequency > 100/min. Impulses are generated in the ventricles beneath the His bundle; It is a wide-complex tachycardia (QRS width > 0.12s); The most common cause is; Re-entry in a scar after a myocardial infarction; which generates impulses with a frequency > 100/min.; 50% of VT cases have preserved retrograde ...

Background— ECG criteria identifying epicardial (EPI) origin for ventricular tachycardia (VT) in nonischemic cardiomyopathy have not been determined. Endocardial (ENDO) and EPI basal left ventricle fibrosis characterizes the VT substrate. Methods and Results— We assessed the QRS from 102 basal-superior/lateral EPI and 67 comparable ENDO pace maps in 14 patients with nonischemic ...

Left Ventricular Outflow Tract Tachycardia. Left Ventricular Outflow Tract (LVOT) TachycardiaIt is the second most common idiopathic VT; Accounts for 20% of idiopathic VTs; Ectopic focus is most commonly located:; At the aortic root near the origin of coronary arteries (Valsalva sinus); Basal part of the left ventricle; Epicardium of the left ventricular outflow tract

Ventricular Tachycardia. Ventricular tachycardia (VT) has a ventricular ectopic focus below the His bundle; Produces specific ECG signs; The focus generates impulses with a frequency > 100/min.; The mechanism of impulses can be:; Re-entry (most common)Increased automaticity; Triggered activity; Produces wide QRS complexes (>0.12s); Rarely, the QRS complexes are narrow (VT from the septal ...

The surface ECG is a simple noninvasive tool and is particularly conducive to localize the SOO of ectopic foci in patients with structurally normal hearts, but the close anatomic proximity of the OTs and the complex overlay of the anterior and leftward directed right ventricular OT (RVOT) with the posterior and rightward directed left ventricular OT (LVOT) makes clear separation and the ...

Ventricular tachycardia refers to a wide QRS complex heart rhythm — that is, a QRS duration beyond 120 milliseconds — originating in the ventricles at a rate of greater than 100 beats per ...

Left Ventricular Outflow Tract Tachycardia Less commonly than RVOT tachycardias there are tachycardias that arise from the left ventricular outflow tract and the aortic cusp region. These tachycardias may have a very different ECG appearance from RVOT but some left outflow tract tachycardias have more subtle differences for example with earlier ...

Left fascicular ventricular tachycardia is the most common of the idiopathic ventricular tachycardias originating in the left ventricle. It is approximately 10% of all idiopathic VTs (the most common idiopathic VT are right ventricle outflow tract tachycardia) 1. Left fascicular ventricular tachycardias usually ocurr in healthy patients, mainly as sustained monomorphic VT, with right bundle ...

Left ventricular outflow tract tachycardia (LVOT-VT) is an uncommon type of idiopathic left ventricular tachycardia (ILVT) thought to be due to cyclic adenosine mono phosphate (c-AMP) mediated triggered activity. The arrhythmia can be terminated pharmacologically with calcium channel blockers or beta-blockers . LVOT-VT can arise above or below ...

Keywords: Left fascicular ventricular tachycardia, right bundle branch block narrow complex tachycardia. INTRODUCTION. Idiopathic left fascicular ventricular tachycardia (ILFVT) is a ventricular tachycardia (VT) characterized by right bundle branch block (RBBB) and left axis deviation (LAD) on electrocardiogram (ECG).

Ventricular Tachycardia = 3 or more VEB at a rate of > 130 beats/min; If > 30 seconds = sustained; can be monophoric or polymorphic; TYPES. Monomorphic. most common; associated with MI; Polymorphic. QRS at 200 beats/min or more which change amplitude and axis so they appear to twist around the baseline-> treatment is the same for both; MECHANISMS

The timing of the ventricular tachycardia (VT) onset is remarkable, occurring exactly at midnight, with the final episode each night at 2:30 a.m. The CRT‑D device is a Medtronic Crome, equipped with a conventional left ventricular lead via the coronary sinus, programmed in DDD mode with biventricular pacing, as illustrated in Fig. 1.