Ventricular pre-excitation (Wolff-Parkinson-White pattern): Difference between revisions

Ventricular pre-excitation (Wolff-Parkinson-White pattern) (view source)

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 [[Image:wpw_full_ecg3.png|thumb| WPW op een volledig ECG.]]
 In 1930 Louis Wolff, Sir John Parkinson and Paul Dudley White described 11 patients who suffered from bouts of tachcyardias. Their ECGs showed two abnormalities: a short PQ time and a delta-wave.
-Ever since one speaks of the Wolff-Parkinson-White syndrome in patients with complaints of syncope and or tachycardia and a WPW pattern on the ECG. Not all patients with a WPW ''pattern'' on the ECG are symptomatic. The prevalence of the WPW pattern is relatively common in the general population about 0.15-0.25%.
+Ever since one speaks of the '''Wolff-Parkinson-White syndrome''' in patients with complaints of syncope and / or tachycardia and a pre-exitation pattern on the ECG (WPW syndrome = WPW pattern + symptoms). Not all patients with a WPW ''pattern'' on the ECG are symptomatic. The prevalence of the WPW or pre-exitation pattern is relatively common in the general population about 0.15-0.25%.
-The WPW is caused by an extra connection between the atria and the ventricles (accessory bundle) that forms an electrical bypass to the AV node. The part of the ventricle where this accessory bundle connects are the first to depolarize. This is shown on the ECG as a delta wave. The QRS-complex is somewhat widened (> 0.10 sec). Also the PQ time is shorter (< 0.12 sec). By observing the pattern of the delta wave in the different leads, one can estimate the location of the accessory bundle.
+The pre-exitation pattern is caused by an extra connection between the atria and the ventricles (accessory bundle) that forms an electrical bypass to the AV node. The part of the ventricle where this accessory bundle connects are the first to depolarize. This is shown on the ECG as a delta wave. The QRS-complex is somewhat widened (> 0.10 sec). Also the PQ time is shorter (< 0.12 sec). By observing the pattern of the delta wave in the different leads, one can estimate the location of the accessory bundle.
 The risk of having an accessory bundle is the development of tachycardias. Two forms of tachycardias exist: