A 25-year-old female is evaluated for exertional dyspnea of 6 months duration. An electrocardiogram (ECG) demonstrates right axis deviation and incomplete right bundle branch block. Which of the following conditions is most likely associated with these findings?
a) Atrial septal defect (ASD)
b) Pulmonary embolism
c) Chronic obstructive pulmonary disease (COPD)
d) Pulmonary hypertension
