What does abnormal sinus rhythm with Q wave mean?
Apr 17, 2023
Source: Cainiu Health
Dr. Tian Hongbo
Introduction
When an increased Q wave appears under sinus rhythm, meaning the amplitude of the Q wave in the QRS complex is significantly elevated, it is generally considered an abnormal electrocardiographic finding. This abnormality may be caused by conditions such as myocarditis, myocardial cell necrosis, or myocardial infarction. In rare cases, it could also result from improper operation, incorrect electrode placement, or electrode detachment.
When increased Q waves appear under sinus rhythm, meaning the amplitude of the Q wave in the QRS complex is significantly elevated, it is generally considered an abnormal electrocardiographic finding. This abnormality may be caused by conditions such as myocarditis, myocardial cell necrosis, or myocardial infarction.
1. Myocarditis
Myocarditis refers to inflammation of the heart muscle caused by infections, allergic reactions, or immune responses. During myocarditis, the electrical properties of myocardial cells may change due to inflammatory damage, leading to increased amplitude of the Q wave in the QRS complex.
2. Myocardial Cell Necrosis
Myocardial cells may undergo necrosis when affected by inflammation, losing their electrical activity, which results in increased amplitude of the Q wave in the QRS complex.
3. Myocardial Infarction
Elevated Q waves are a common ECG manifestation of myocardial infarction. When a myocardial infarction occurs, myocardial cells in the infarcted area die and lose electrical activity, causing increased amplitude of the Q wave in the QRS complex.
In rare cases, this abnormality may also result from improper operation, such as incorrect electrode placement or electrode detachment. If such abnormalities occur, prompt medical evaluation and further diagnostic testing and treatment should be sought.
