{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Ventricular Tachycardia - Knowledge Abstraction Ventricular...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Knowledge Abstraction: Ventricular Tachycardia Definition: Originates below the bundle of His at a rate greater than 100 beats per minute, is a wide- complex rhythm that may be monomorphic (uniform) or polymorphic with beat-to-beat changes in the QRS configuration (Fig. 64-3). FIGURE 64-3 Ventricular tachyarrhythmias. A, Rhythm strip showing monomorphic ventricular tachycardia. B, Example of polymorphic ventricular tachycardia. C, Example of ventricular fibrillation. All tracings are from lead V 1 . Sustained VT persists for 30 seconds or longer or requires termination because of hemodynamic instability. Sustained polymorphic VT is generally unstable and often degenerates into VF Sustained monomorphic VT may be stable for long periods or, with faster rates or myocardial ischemia, may degenerate into polymorphic VT or VF Torsades de pointes (TdP), a particular form of polymorphic VT, has a characteristic morphology (“twisting around a point”) and is associated with prolongation of the QT interval on the surface ECG. TABLE 64-1 -- ELECTROCARDIOGRAPHIC CHARACTERISTICS OF VENTRICULAR TACHYCARDIA ATRIOVENTRICULAR RELATIONSHIP Atrioventricular dissociation
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}