Here is the latest ECG Puzzler to solve. A 65-year-old female applied for life insurance. She disclosed a history of chronic bronchitis since childhood. She was prescribed prednisone
and Levosin. Her BMI is 22.
From the records her most recent SpO2 was 93%, but it had been as low as 90% in the past. No pulmonary function testing was included. The ECG done for insurance appears below.