Watch the B Flat Blues: 4 online guitar lesson by TrueFire from Play Country Guitar 10: Advanced Soloing Approaches
B Flat Blues: 4 - Breakdown is a video guitar lesson presented by Jim Campilongo and is sourced from Sonic Tele.
Here we are retaining the highest note in the chord throughout several chord changes. Listen to the examples and try to hear the single note that is consistent as the chords change. Notice the feeling of tension and release that is created by maintaining the note.