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Introduction The differential diagnosis of tachycardias using the electrocardiogram (ECG) remains among the most difficult problems faced by cardiologists in daily practice. Distinguishing supraventricular tachycardias (SVTs) from ventricular tachycardias (VTs) has obvious importance because treatments are very different. This chapter…

Key Points Diagnosis of superoparaseptal ( anteroseptal ) and midseptal accessory pathways (APs) is made on the basis of an electrocardiographic pattern (if overt preexcitation is present) and evidence of midseptal/anteroseptal AP insertions during intracardiac mapping studies. Orthodromic supraventricular tachycardia…

Additional content is available online at Elsevier eBooks for Practicing Clinicians It is estimated that almost a third of people will have a problematic tachyarrhythmia, most often atrial fibrillation (AF), at some point during a normal life span. Thus, most…