Table 1 Baseline characteristics of the study population

Age at surgery (years)

44.1 ± 13.1

44.0 ± 13.1

0.96

Sex

 Male

46 (52)

42(49)

0.65

 Female

42 (48)

44(51)

0.65

Body surface area (m²)

1.8 ± 0.2

1.7 ± 0.2

0.31

Systolic blood pressure (mmHg)

114 ± 11

116 ± 11

0.25

Diastolic blood pressure (mmHg)

69 ± 9

71 ± 6

0.05

Smoker

22 (25)

–

–

Family history of HCM

19 (22)

–

–

Duration of HCM course (years)

6 (3, 10)

–

–

Diabetes

2 (3)

–

–

Hypercholesterolemia

17 (19)

–

–

New York Heart Association functional class

 I

1 (1)

–

–

 II

25 (28)

–

–

 III

60 (68)

–

–

 IV

2 (2)

–

–

History of atrial fibrillation

10 (11)

–

–

Symptom

 Chest tightness

62 (71)

–

–

 Dyspnea

42 (48)

–

–

 Chest pain

26 (30)

–

–

 Palpitation

19 (22)

–

–

 Syncope

18 (21)

–

–

Medications

–

–

 Beta-blockers

68 (77)

–

–

 Calcium channel blockers

26 (30)

–

–

 Diuretic

10 (11)

–

–

 Antiarrhythmic

13 (15)

–

–

Echocardiography

–

–

 Mitral regurgitation (none/mild/moderate/severe)

2/33/43/10

–

–

 LV outflow tract pressure gradient (mmHg)

74 (60, 92)

–

–