Ecg contest ECG, March 2020

A 42-year-old man with a previous diagnosis of right ventricular arrhythmogenic cardiomyopathy and a carrier of a single-chamber implantable cardioverter-defibrillator (ICD) for primary prevention attended the emergency room due to a 1-hour history of palpitations, accompanied by general malaise. The ECG recorded is shown in figure 1.

Figure 1

What do you think was the diagnosis?

• 1.

  Aberrant supraventricular tachycardia.

• 2.

  Antidromic tachycardia.

• 3.

  Ventricular tachycardia with ventriculoatrial conduction.

• 4.

  Dual tachycardia.

Submit your answer to http://www.revespcardiol.org/es/electroreto/73/03. The answer will be published in the next issue (April 2020). #RetoECG.