Ventricular Tachycardia

Ventricular Tachycardia PowerPoint PPT Presentation


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Premature Ventricular Contractions. Also termed Ventricular Ectopics, Ventricular Premature Complexes, Ventricular Extrasystoles.When a focus within the ventricles prematurely begins myocardial depolarisation, the electrocardiogram shows a beat of abnormal morphology. The wide QRS complex will eit

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Ventricular Tachycardia

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1. Ventricular Tachycardia Usually initiated by premature ventricular complexes, ventricular tachycardia is continued by re-entry mechanisms. The condition is dangerous if the rate increases to the point when the R wave overlaps with the T wave. In this case the arrhythmia can degenerate into Ventricular Fibrillation.

2. Premature Ventricular Contractions Also termed Ventricular Ectopics, Ventricular Premature Complexes, Ventricular Extrasystoles. When a focus within the ventricles prematurely begins myocardial depolarisation, the electrocardiogram shows a beat of abnormal morphology. The wide QRS complex will either have initially a high-energy negative, or positive, deflection. The direction of this deflection is dependent upon the exact location of the focus. The beat is distinguishable from a bundle branch block by being premature.

4. Ventricular Fibrillation Ventricular fibrillation is a form of cardiac arrest during which ventricular contractions are rapid, irregular and ineffective. The arrhythmia is multifocal, and can appear coarse or fine on the electrocardiogram. P, QRS and T waves are not detectable. CPR should be administered while waiting for the arrival of a defibrillator.

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