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Table 1 Comparison of ECG parameters before and after propanolol

From: Effect of propranolol on heart rate variability in hyperthyroidism

Variables

Before

After

p (Wilcoxon)

HR

91 ± 18

79 ± 9

0.02

R–R

668.8 ± 126.8

762.4 ± 77.3

0.01

QT

360.9 ± 29.2

384.3 ± 15.9

0.01

Corrected QT

447 ± 10.9

440.8 ± 21.5

0.86

P–R

133.9 ± 54.7

172.7 ± 43.63

0.01

QRS

93 ± 6.1

97 ± 10.2

0.01

Mean RR (s)

0.71 ± 0.08

0.79 ± 0.06

0.02

Mean HR (min−1)

85.5 ± 9.3

76.1 ± 5.1

0.02