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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