Table 3

 Echocardiographic measurements at rest, after exercise and the change between rest and exercise for patients with aortic stenosis and controls

ECGRestAfter exerciseDifference between rest and exercise
Aortic stenosisControlsp ValueAortic stenosisControlsp ValueAortic stenosisControlsp Value
*Mann–Whitney U test used where variables are not normally distributed.
†For post-exercise, S’ and difference between rest and exercise of S’ p values were 0.0002 and 0.0005, respectively after adjusting for age, sex, body mass index, heart rat and exercise time with analysis of covariance. After excluding the six patients with aortic stenosis taking a β-blocker, p values were 0.01 and 0.006, respectively.
‡RSVP could be measured after exercise in 16 patients with aortic stenosis and 14 controls.
Ejection fraction, %69 (7)62 (5)0.01†72 (9)73 (9)0.6*4 (7)11 (8)0.02
End systolic volume, ml37 (19)48 (14)0.0823 (12)23 (13)0.8*−13 (19)−25 (10)0.03*
End diastolic volume, ml94 (33)119 (33)0.0483 (25)81 (23)1.0*−12 (32)−38 (24)0.01
Peak systolic mitral annularvelocity, S’, cm/s8.5 (1.5)9.1 (1.8)0.1512.2 (3.2)17 (2.8)<0.001†4 (3)7.9 (1.5)<0.001†
Velocity time integral of S’, cm1.58 (0.4)1.85 (0.4)0.041.66 (0.51)2.24 (0.21)0.00030.13 (0.38)0.41 (0.47)0.04
Right ventricular systolicpressure, mm Hg‡21 (6)19 (4)0.347 (15)35 (9)0.03*26 (14)17 (9)0.05*