What is PR interval shortening?

Sinus rhythm PR interval shortening refers to the shortening of the time from the sinus node to the atrial muscle.

Sinus rhythm is a normal ECG rhythm, which means that the pacemaker of the heart sends electrical signals in the sinus node, and then transmits to the atrium and ventricle, and causes corresponding contraction. PR interval indicates the time from the sinus node to the atrial muscle. When the PR interval of sinus rhythm is shortened, it means that this time is shorter than normal. It may be related to atrial hypertrophy, atrial flutter or atrial fibrillation, intra-atrial conduction block, ischemia of the sinus node area, etc.

It should be noted that the shortening of the PR interval of sinus rhythm is not necessarily a pathological manifestation, but sometimes it may be the result of normal variation. However, if there are discomfort symptoms such as palpitations and chest distress, it is recommended to seek medical advice and follow the doctor's treatment advice.