BNP: An important new cardiac test

BNP is a hormone produced by the body when the heart is enlarged. Testing a person's BNP level is an easy and accurate way to help doctors diagnose congestive heart failure. More »

Medical memo: Stress and cholesterol

A British study suggests a link between increased stress and a rise in cholesterol level, and a follow-up several years later showed the trend continued over time. (Locked) More »

On call: Prostate surgery and nighttime urination

A urologist diagnosed prostate cancer, and I decided to have my prostate removed. I've done fine, except that I have to urinate two or three times every night, just as before. I thought prostate operations were supposed to help this. What went wrong? (Locked) More »