Case presentation A 70-year-old man presented to a pulmonologist with progressive shortness of breath and intermittent palpitation. Case history The patient reported a history of chronic obstructive pulmonary disease (COPD) that had previously been treated with inhalers. Lately, he had been suffering from periodic palpitations. According to the patient, his heart beats rapidly due to his COPD. Physical examination § Blood Pressure: 100/70 mm Hg § An ECG was conducted, the results of which are shown in the attached image. What is the probable diagnosis for this patient based on the ECG findings?
A. Sinus tachycardia B. Atrioventricular nodal reentry tachycardia C. Atrial flutter with variable block D. Atrial fibrillation *This Case Challenge is from the Editorial Team of Docplexus and is meant for educational purposes only.
