When explaining coronary anatomy to a patient, I compare the coronary arteries to the roots that feed a tree. By way of illustration, I wrap the fingers of one hand over the fist of the other. — Joan M. Lacey, ACNP, ANP, AACC, Greenville, S.C. (163-7)

These are letters from practitioners around the country who want to share their clinical problems and successes, observations and pearls with their colleagues. We invite you to participate. If you have a clinical pearl, submit it here.