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Table 2 Comparisons of symptom scores, changes of heart rate in POTS children treated by metoprolol

From: Orthostatic plasma norepinephrine level as a predictor for therapeutic response to metoprolol in children with postural tachycardia syndrome

Treatment

Responders (n = 13)

Nonresponders (n = 12)

Symptoms scores

Delta HR (beats/min)

Symptoms scores

Delta HR (beats/min)

Pre-treatment

7.4 ± 1.9

55.2 ± 12.7

7.2 ± 2.7

43.6 ± 8.7

Post-treatment

0.4 ± 1.1

27.4 ± 7.8

5.0 ± 2.2

32.3 ± 9.7

P value

<0.001

<0.001

<0.001

0.001