Entire group (n=55) | GAA expansion (n=45) | Normal allele (n=10) | |
---|---|---|---|
Heart rate (beats/min) | 77 (12) | 77 (13) | 75 (13) |
PR interval (ms) | 145 (22) | 143 (21) | 158 (25)3-150 |
QRS duration (ms) | 85 (13) | 86 (14) | 87 (10) |
QTc | 417 (33) | 417 (37) | 412 (15) |
P wave axis (°) | 48 (23) | 54 (19) | 27 (25)** |
R wave axis (°) | 76 (54) | 83 (54) | 38 (27)3-150 |
R aVL (mm) | 3.0 (3.7) | 2.8 (4.0) | 5.6 (5.0) |
S V1 (mm) | 2.7 (2.5) | 6.7 (4.4) | 9.4 (3.4) |
R V6 (mm) | 9.1 (4.4) | 9.1 (4.5) | 9.4 (3.7) |
S V1 + R V6 , (mm) | 16.0 (7.5) | 15.7 (7.5) | 18.5 (6.3) |
Q waves >1 mm (anterior/inferior) | 1/3 | 1/3 | 0/0 |
T wave inversion (anterior/inferior) | 25/24 | 24/23 | 1/1 |
Widespread inferolateral T wave changes | 20 | 19 | 1 |
Values are mean (SD).
↵3-150 p<0.05, **p<0.01 v those homozygous for the GAA expansion.