Which Heart point is 1 cun proximal to HT 7 on the radial side?

• A. HT 5
• B. HT 4
• C. HT 6
• D. HT 7

Answer: (A)

The heart channel along the forearm runs on the radial (thumb) side of the flexor carpi ulnaris tendon. HT 7 sits at the wrist crease on that tendon. Moving proximally, the points are spaced by specific cun distances: 0.5 cun above HT 7 is HT 6, 1 cun above HT 7 is HT 5, and about 1.5 cun above HT 7 is HT 4. Therefore, the point exactly 1 cun proximal to HT 7 on the radial side is HT 5 Tongli. The other options correspond to different proximities along the same line.