NSR stands for Normal Sinus Rhythm.
What does NSR mean?
a normal, regular heartbeat originating from the sinus node
NSR stands for normal sinus rhythm, the normal heartbeat of a healthy heart. It means the electrical signal starts in the sinoatrial (SA) node, the heart natural pacemaker, and travels normally through the heart. On an ECG, NSR shows a regular rhythm, a rate between 60 and 100 beats per minute, an upright P wave before each QRS complex, and a consistent PR interval. It is the baseline rhythm that other rhythms, such as atrial fibrillation, are compared against.
When is NSR used?
NSR is documented in cardiology, emergency, and general medical notes whenever an ECG or rhythm strip is reviewed.
Frequently asked questions
What does NSR stand for?
NSR stands for normal sinus rhythm, the normal regular heartbeat of a healthy heart.
What heart rate counts as normal sinus rhythm?
A rate between 60 and 100 beats per minute, with a regular rhythm originating from the sinus node.
What does NSR look like on an ECG?
A regular rhythm with an upright P wave before each QRS complex and a consistent PR interval.
Why does NSR matter?
It is the baseline normal rhythm that abnormal rhythms, such as atrial fibrillation, are compared against.