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Table 3 Duration of S1, S2, systolic murmur and relative duration of systolic murmur

From: Phono-spectrographic analysis of heart murmur in children

Group Duration
  S1 (ms) S2 (ms) Murmur (ms) Murmur (%)
Vibratory 81 ± 15 69 ± 12 100 ± 21 53 ± 12
Ejection 92 ± 16 75 ± 14 84 ± 36 44 ± 17
Pathological 87 ± 19 77 ± 17 147 ± 49 78 ± 21
p-value 0.47 0.029 < 0.001 < 0.001