The QRS complex is composed of the Q, R and S waves, and the QRS complex itself can have different shapes with more specific readings of the waves that gives a suggestion on the underlying pathology. Learn with us how to name the QRS complex and how to differentiate between narrow and wide complex and their clinical causes. Also in this section you will understand how pre-excitation syndromes affects the QRS causing a wide complex while going through the mechanism of pre-excitation syndromes.
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