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Abnormal Q-wave in children. The first report: QS-pattern in lead V1
Japanese Circulation Journal
|December 1, 1985
Summary
QS-pattern in lead V1 is not always abnormal in healthy children. This common finding in pediatric electrocardiography is often due to normal electrical rotation of the heart.
Area of Science:
- Pediatric Cardiology
- Electrophysiology
- Diagnostic Electrocardiography
Background:
- The QS-pattern in lead V1 of an electrocardiogram (ECG) can sometimes raise concerns for cardiac abnormalities.
- Understanding normal variants in pediatric ECGs is crucial for accurate diagnosis.
Purpose of the Study:
- To investigate the vectorcardiographic characteristics of healthy children presenting with a QS-pattern in lead V1.
- To determine if this pattern represents an abnormal finding in pediatric populations.
Main Methods:
- Vectorcardiographic analysis was performed on 17 healthy children aged 6 to 15 years with a QS-pattern in lead V1.
- Specific measurements included azimuth at 10 and 20 milliseconds, and the azimuth of maximum spatial voltage.
Main Results:
- The study observed a leftward displacement of azimuth at 10 and 20 msec.
- A slight posterior displacement of the azimuth of maximum spatial voltage was noted.
- The anterior component of the QRS loop was minimal.
Conclusions:
- A QS-pattern in lead V1 is not necessarily indicative of an abnormal condition in healthy children.
- The primary cause for this pattern in pediatric patients is likely normal electrical rotation of the heart.