Table 3 Comparison of the features of QRS complex on surface 12-lead ECG in two groups (cases%)
Group | I QRS shape | RII > RIII | QSaVR > QSaVL | R wave descending notch in II, III, aVF leads | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Rs | rs or rS | R, r, or m | qs or qr | |||||||
RVOT (n = 104) | 4(3.85) | 37(35.58) | 45(43.27) | 18(17.31) | 59(56.73) | 59(56.73) | 16(15.38) | |||
LVOT (n = 52) | 6(11.54) | 33(63.46) # | 12(23.08)## | 1(1.92) ## | 19(36.54) ## | 19(36.54) ## | 8(15.38) | |||
Left coronary sinus (n = 32) | 1(3.13) | 26(81.25) | 4(12.50) | 1(3.13) | 6(18.75) | 6(18.75) | 0☆ | |||
Right coronary sinus (n = 11) | 2(18.18) | 1(9.09) *△ | 8(72.73) *△ | 0 | 11(100.00) *△ | 11(100.00) *△ | 0* | |||
Under left coronary sinus (n = 9) | 3(33.33) | 6(66.67) | 0 | 0 | 2(22.22) | 2(22.22) | 8(88.89) | |||
V1 QRS complex shape | V2 QRS complex shape | Precordial leads transition | ||||||||
rS | R | RS or Rs | rS | R | RS orRs | ≤V1 | ≤V2 | <V3 | ≥V3 | Transitional index >0 |
99(95.19) | 0 | 5(4.81) | 94(91.00) | 2(1.92) | 8(7.69) | 2(1.92) | 7(6.73) | 17(16.35) | 78(75.00) | 6(5.77) |
29(55.77) # | 8(15.38)# | 15(28.85)# | 12(23.08)# | 16(30.77)# | 24(46.15)# | 22(42.31)# | 15(28.85)# | 12(23.08) | 3(5.77)# | 49(94.23)# |
20(62.50) ☆ | 1(3.13) ☆ | 11(34.38) | 5(15.63) | 7 (21.88) | 20(62.50) ☆ | 11(34.38) | 14(44.16) | 7(22.58) | / | 30(93.75) |
9(81.82) â–³ | 0 â–³ | 2(22.22) | 7(63.64) **â–³ | 0 â–³ | 4(36.36) | 2(22.22) â–³ | 1(11.11) *â–³ | 5(45.45) **â–³ | 3(27.27) | 10(90.91) |
0 | 7(77.78) | 2(22.22) | 0 | 9(100.00) | 0 | 9(100.00) | 0 | 0 | / | 9(100.00) |