Add Yahoo as a preferred source to see more of our stories on Google. Electrocardiograms, or ECGs, record the electrical activity of your heart. Randy Faris/The Image Bank via Getty Images Your ...

The human heart rate is under the influence of various hormonal and neural control mechanisms. Normally, conduction of an electrical impulse through the heart begins at the sinoatrial (SA) node and ...

The pacemaker is being reinvented. Originally, it was developed to remedy heart rhythm irregularities by use of electrical stimulation. The first pacemaker was implanted 66 years ago, in 1958. About ...

The rhythm in a working heart is regulated by electrical impulses. Disturbances of this bioelectrical process can result in cardiac arrhythmias, or irregularities in heartbeat -- a common ailment that ...

The pacemaker is being reinvented. Originally, it was developed to remedy heart rhythm irregularities by use of electrical stimulation. The first pacemaker was implanted 66 years ago, in 1958. About ...

First-degree heart block is the mildest type and often requires no treatment. Third-degree heart block is the most severe and often needs a pacemaker to regulate the heartbeat. Many different causes ...

A pacemaker is a small, battery-powered device that controls the heartbeat. Our heartbeats are controlled by a highly efficient, biological electrical system that ensures our heart steadily pumps ...

Dear Dr. Roach: My husband had a stress test done several years ago, and at the time, it was discovered that he had a bundle branch block in his heart. No one mentioned it until recently, after he had ...

Pacemakers are used to regulate the heart — but they're also used elsewhere. Pacemakers are available for the brain, stomach and also the bladder. It's believed at least 50 million people deal with an ...

Your heart’s job is to keep your pulse steady to pump blood throughout your body. Sometimes your heart rate is slower when you’re relaxing, and sometimes it’s faster when you’re exercising or stressed ...