Two for the price of one this month. I am grateful to Arron Pearce, cardiac nurse and ECG analyst for ECG 1, which was recorded from a 76-year-old hypertensive male. ECG 2 was recorded from a 74-year-old female.

Both ECGs show an irregular rhythm but how would you describe the rhythm in each case? Are there any significant differences between the two or are they essentially the same? I’m not absolutely certain of the answers so I would be interested to see what people think.

Dr Dave Richley