Final answer:
The additional physical exam finding expected in this patient is tachycardia.
Step-by-step explanation:
The additional physical exam finding that would be expected in this patient is tachycardia. Tachycardia refers to an abnormally fast heart rate. In this case, the patient's heart rate is likely elevated as a compensatory mechanism to maintain cardiac output and perfusion due to his heart failure symptoms, such as dyspnea, ankle and leg edema, and physical findings of bibasilar rales, JVD, S3 gallop, and biventricular enlargement on echocardiogram.