ECG 89 This is another ECG from the 60-year-old man who was admitted to hospital with a broad complex tachycardia (see the previous example – ECG 88). This ECG was recorded after cardioversion, when he was well. His serum troponin level remained normal following admission, so he had not had a myocardial infarction. How would you report on this ECG, and what do you think the underlying disease is?