Sinus bradycardia, or a slow heart rate, can be a sign of cardiovascular health in healthy young adults and endurance athletes. It can also be a sign of an underlying condition requiring medical ...

A sinus infection is inflammation of the sinuses, which are the air spaces around your nose, eyes, cheeks, and forehead. It is also called sinusitis. When the sinuses are inflamed, drainage is blocked ...

Twelve patients were reverted from atrial fibrillation to sinus rhythm by the technic of "cardioversion." Brief, light anesthesia was the only drug employed. Under conditions of comparable oxygen ...

An assessment was made of cardiac function by means of right heart catheterization before and immediately after conversion of atrial fibrillation to sinus rhythm in 11 studies on 10 human subjects.