Review Question - QID 106827

A 26-year-old female presents to the emergency department because she feels like her heart is racing and "beating out of her chest." She states that she otherwise feels well but is very concerned. Upon obtaining further history she states that this has happened to her multiple times before and that her cardiologist had diagnosed her with an abnormality that for some of the episodes had been treated by procainamide. Prior to this episode the patient had taken a dose of her grandpa's verapamil as she thought it would help with some underlying anxiety she was having. The patient is afebrile with a pulse of 225/minute, a blood pressure of 124/80 mmHg and a respiratory rate of 12/minute. The emergency physician obtains an EKG, which is shown in Figure F. The physician subsequently administers a medication that successfully resolves the tachycardia. A new EKG is obtained following resolution of the tachycardia. Which of the following most likely represents this new EKG?