At age 76, I was diagnosed with sinus node dysfunction last year after several episodes of what I’d call being “spaced out” ...

— G.W.T.Dear G.W.T.: The sinus of the heart has nothing to do with your nose as you might guess; it's a structure in the right atrium where blood flows into the heart from the venae cavae. It contains ...

At age 76, I was diagnosed with sinus node dysfunction last year after several episodes of what I’d call being “spaced out” (for lack of a better term). I couldn’t explain these instances to myself, ...

Amanda Gardner is a health reporter whose stories have appeared in cnn.com, health.com, cnn.com, WebMD, HealthDay, Self Magazine, the New York Daily News, Teachers & Writers Magazine, the Foreign ...