During recording of an ECG, a depolarization that travels toward a positive lead will cause an upward deflection.

Name: During recording of an ECG, a depolarization that travels toward a positive lead will cause an upward deflection.
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Depolarization moving toward a positive electrode (lead) on an ECG results in an upward deflection because the electrical activity is moving towards the positive pole, which is interpreted as a positive change in voltage on the ECG trace.

During Recording of an ECG, a Depolarization That Travels Toward