MS-0081

An 80-year-old man arrives at the emergency department with complaints of lightheadedness, fatigue, and shortness of breath during exertion. Upon examination, you observe a pulse rate of 42 beats per minute, mild bibasal crepitations, and bilateral peripheral pitting edema. The patient’s ECG reveals a dissociation between the P waves and QRS complexes. Which aspect of the JVP waveform is most likely to be impacted in this individual?