A 72-year-old man was admitted to the general surgery department after a Hartmann intervention for diverticulitis. On different days after the operation, he required attention for tachyarrhythmia that always remitted with carotid sinus massage. Figure 1 shows the response to one of the massages (the expanded traces reflect different times in the response: Left panel, V5-V6 capture the end of the tachycardia; Right panel, aVF and V1 show the ongoing response to massage). Figure 2 shows the baseline electrocardiogram.
What type of tachycardia did the patient have?
- 1.
Atrial tachycardia with first-degree atrioventricular block.
- 2.
Sinus tachycardia.
- 3.
Nodal re-entry tachycardia.
- 4.
Tachycardia mediated by orthodromic accessory pathway.
Submit your answer to www.revespcardiol.org/en/electroreto/73/05. The answer will be published in the next issue (June 2020). #RetoECG.