A negative deflection following an R wave is called which wave?

Study for the Basic Arrhythmias With 12 Lead EKG's Test. Use our flashcards and multiple choice questions with hints and explanations. Get exam-ready!

Multiple Choice

A negative deflection following an R wave is called which wave?

The negative deflection after the upright R wave is the S wave. In the QRS complex, you may see a small downward deflection before the R wave (the Q wave), then the tall upward R wave, and, if present, a downward deflection after R—the S wave. The T wave that follows after the QRS represents ventricular repolarization. So the deflection occurring immediately after the R wave in the QRS is called the S wave.

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