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Corneal Epithelium

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The Electromagnetic Spectrum

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Wolff Parkinson White Syndrome (WPW)

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Wolff Parkinson White Syndrome (WPW) is characterized by an abnormal accessory pathway in the heart leading to arrhythmias. Pathology: Born with an accessory pathway, the bundle of Kent which connects the atria and ventricle. The electrical impulses from the SA node reach the ventricles earlier via the accessory pathway as there is no AV nodal delay in this pathway. This leads to the preexcitation of the ventricle and initiation of ventricular contraction. This ventricular contraction is prolonged when the impulse via the AV nodal pathway reaches the ventricles. Most common location of the accessory pathway- between the left atrium and free wall of the left ventricle ECG changes:   Shortened PR interval(typically <120 ms) - because of the early initiation of ventricular depolarization. Prolonged QRS duration (total duration >0.12 seconds)- because of the AV nodal impulse reaching the ventricles after the aberrant impulse. Delta waves - slurred upstroke of QRS c...
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