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A 56-year-old man was referred for an electrophysiology opinion following an unexplained episode of syncope leading to a motor vehicle accident. Routine baseline investigations including an echocardiogram were normal. Following admission, the telemetry strip below was recorded (Figure 1). What is the mechanism of tachycardia?
What is the mechanism of the tachycardia? (Figure 1)
Supraventricular tachycardia (SVT) with aberrancy
Antidromic AV re-entry tachycardia
Supraventricular tachycardia with a bystander accessory pathway (AP)
For the answer see page 1986
From the question on page 1932
Contributors Only those who have made an important contribution to the study and are thoroughly familiar with the primary data are included as authors. All authors are responsible for the contents and have read and approved the manuscript.
Competing interests None.
Provenance and peer review Not commissioned; externally peer reviewed.
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