The placement of a permanent pacemaker is the definitive treatment for sinus node dysfunction, but not everyone needs this.

The sinus of the heart is a structure in the right atrium where blood flows into the heart from the venae cavae.

— 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 ...

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, ...

Veterinary care is an important part of keeping pets healthy. I work for a veterinarian, and in our practice we constantly stress the importance of heartworm testing and heartworm prevention for dogs ...