When your electrical system is working normally, the two upper chambers of the heart (atria) contract and pump blood into the two lower chambers (ventricles) in a well-coordinated way. This results in ...

A 63-year-old African-American woman arrived at the emergency department with a 24-hour history of severe, nonexertional, substernal chest pain that radiated down her left arm. Associated symptoms ...

Atrial fibrillation is a chronic, progressive disorder, and persistent forms of atrial fibrillation are associated with increased risks of thromboembolism and heart failure. Catheter ablation as ...

This Journal feature begins with a case vignette highlighting a common clinical problem. Evidence supporting various strategies is then presented, followed by a review of formal guidelines, when they ...

A 63-year-old African-American woman with a 24-hour history of severe, nonexertional chest pain and new-onset paroxysmal atrial flutter without ST-segment elevation was treated with enoxaparin and ...