The Delta waves
Let’s talk about Delta waves.
Delta wave is slurring slow rise of initial portion of the QRS and is usually associated with short PR interval. It is most commonly associated with pre-excitation syndrome such as Wolff Parkinson White (WPW).
Delta waves can be:
✅ Positive
✅ Negative
Delta wave - positive
Negative Delta waves can mimic a myocardial infarction, therefore it's termed pseudoinfarction pattern.
Delta wave - negative
In 1893, Stanley Kent described lateral atrioventricular (AV) connections and thought these constituted the normal specialized AV conduction system. This work proved controversial and was, in fact, rejected by such notables as Sir Thomas L.
In 1930, Louis Wolff, John Parkinson and Paul Dudley White published a case series consisting of 11 patients who experienced paroxysmal tachycardia associated with an underlying EKG pattern with short PR and wide QRS.
While the eponym Wolff–Parkinson–White (WPW) syndrome is attributed to the landmark article published by the trio in 1930, other case reports of the same entity were previously reported in the literature.
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