McGill Case 300

This case report is kindly provided by Michael Rosengarten from McGill and is part of the McGill Cases. These cases come from the McGill EKG World Encyclopedia. Previous Case: McGill Case 299 | Next Case: McGill Case 301

This is a rhythm strip recorded from a man attending the pacemaker follow-up clinic. The Patient had been implanted with a ventricular pacemaker one week before. In about the middle of the tracing a magnet was placed over the pacemaker. Why are there so many spikes on the first half of the tracing? Can you identify the manufacturer of and the type of the pacemaker ? Do you think the pacer is working?