What is a sinus rhythm?

A sinus rhythm is a type of heart rhythm that originates in the sinoatrial (SA) node, which is located in the right atrium of the heart. The SA node is the natural pacemaker of the heart and is responsible for generating the electrical impulses that cause the heart to contract.

A sinus rhythm is characterized by a regular, steady heartbeat with a heart rate between 60 and 100 beats per minute (bpm). The heartbeats are typically spaced evenly, and there are no skipped or extra beats.

In a normal sinus rhythm, the electrical impulses generated by the SA node travel through the heart in a specific pathway, causing the atria and ventricles to contract in a coordinated fashion. This results in the pumping of blood from the heart to the rest of the body.

Sinus rhythm is the most common heart rhythm and is considered to be a normal rhythm. However, certain conditions can cause abnormalities in sinus rhythm, such as arrhythmias, which can disrupt the normal pattern of electrical impulses in the heart.