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Table 1 Subject characteristics. Parameter values are presented as mean ± SD. Number of subjects is given as a quantity with the proportion (%) relative all subjects within brackets. Abbreviations: ARVC = arrhythmogenic right ventricular cardiomyopathy, BMI = body mass index, CMR = cardiac magnetic resonance, n = number, n.a. = not applicable, PH = pulmonary hypertension, RVEF = right ventricular ejection fraction, TAPSE = tricuspid annular plane systolic excursion, TTE = transthoracic echocardiography

From: Right ventricular ejection fraction measurements using two-dimensional transthoracic echocardiography by applying an ellipsoid model

Variables

Patients (n = 25)

Healthy subjects (n = 12)

Overall (n = 37)

Age (year)

55 ± 11

36 ± 12

49 ± 15

BMI [weight(kg)/length(m)2]

27 ± 4

24 ± 4

26 ± 4

Women

5 (20%)

4 (33%)

9 (24%)

RVEF by TTE (ellipsoid model), %

45 ± 7

59 ± 3

50 ± 9

TAPSE by TTE, mm

17 ± 5

22 ± 3

19 ± 5

RVEF by CMR (endocardial delineation in short-axis images and summation of subvolumes), %

38 ± 10

56 ± 4

43 ± 12

Time difference between CMR and TTE, days

29 ± 26

n.a.(a)

n.a.(a)

Absence of significant heart valve disease at TTE(b)

20 (80%)

12 (100%)

32 (86%)

Absence of significant pericardial effusion at TTE(c)

25 (100%)

12 (100%)

37 (100%)

Diagnosed with or suspected primarily right-sided pathology before or during the current time of study entry(d)

7 (28%)

0 (0%)

7 (19%)

  1. (a) All healthy subjects had CMR and TTE at the same visit (separated by <30 min)
  2. (b) Valve disease defined as significant stenosis and-/or regurgitation (≥ grade 2/3)
  3. (c) Pericardial effusion defined as being recognized with a clear hemodynamic influence
  4. (d) One patient was diagnosed with ARVC, five patients had suspected primarily right-sided pathology and one patient had biventricular dilated cardiomyopathy