A 55-year-old man with long-standing congestive heart failure presents with worsening bilateral pedal edema despite normal serum albumin levels. Which physiological mechanism is the primary driver of edema formation in this patient?
A
Reduced plasma oncotic pressure due to protein loss
B
Increased capillary hydrostatic pressure secondary to venous congestion
C
Primary lymphatic obstruction
D
Increased capillary permeability from inflammation