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Table 2 Comparison between the 2 study groups as regards different study variables

From: Role of QRS fragmentation in 12-lead surface ECG in prediction of isolated epicardial coronary artery ectasia and its anatomical distribution in patients without acute coronary syndromes

 Normal group (N = 50)Ectasia group (N = 50)P value
Age54.02 ± 9.54 (32–70)56.31 ± 8.85 (36–72)0.220
Male sex28 (56.0%)41 (82.0%)0.005
Smoking14 (28.0%)29 (58.0%)0.002
DM17 (34.0%)29 (58.0%)0.016
Dyslipidemia10 (20.0%)13 (26.0%)0.476
Family history of premature IHD6 (12.0%)10 (20.0%)0.275
Hypertension22 (44.0%)26 (52.0%)0.423
SBP121.70 ± 15.31 (100–160)128.60 ± 15.35 (100–160)0.027
DBP78.80 ± 12.06 (60–110)79.60 ± 9.68 (60–100)0.715
QRS fragmentation6 (12.0%)47 (94.0%)0.000
Pulmonary artery pressure (mmHg)36.70 ± 14.9036.82 ± 13.900.967
Mitral regurgitationGrade 119 (38%)18 (36%)0.663
Grade 26 (12%)5 (10%)
Grade 32 (4%)1 (2%)
Grade 40 (0%)0 (0%)
Diastolic dysfunctionGrade 117 (34.0%)24 (48%)0.044
Grade 20 (0%)3 (6%)
Grade 30 (0%)0 (0%)
Grade 40 (0%)0 (0%)