Brisk walking is a simple and effective cardio exercise that significantly improves heart health. It doesn't need any ...

When the patient's heart was removed, a portion of the right atrium was left behind including the native sinoatrial node (SA node). A new heart was implanted which also included a SA node.

Pathologic fibrosis of the AV node can occur especially with aging resulting in first degree AV block, second degree AV block (Type I or Type II) or complete heart block known as third degree ...