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Seventeen healthy children with QS-pattern in lead V1 were studied vectorcardiographycally. Age ranged from 6 to 15 years old. Azimuth at 10 and 20 msec displaced leftward and azimuth of maximum spatial voltage slightly displaced posteriorly. Anterior component was minimal. QS-pattern in lead V1 in children is not necessarily abnormal finding. The main cause of QS-pattern in lead V1 is electrical rotation of the heart.

Abnormal Q-wave in children the first report: QS-pattern in lead V1.