6. Choice A is the correct answer. Wolff Parkinson White Syndrome is when there is an accessory pathway for ventricular stimulation between the SA and AV node. This produces the characteristic delta wave. There is a defect in the Q wave causing the up sloping but this is not what we see in left bundle block. Ventricular Tachycardia is much faster (usually a rate over 150 beats per minute) and the QRS complex is widened. Patients with Wolff Parkinson White are prone to paroxysmal atrial tachycardia.
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