Determinants of Thyrotoxic Cardiomyopathy Recovery
Table 1
Clinical conditions, thyroid hormones, and echocardiography parameters at referral.
25th percentile
Median
75th percentile
Clinical variables
Age (years)
28
33
42
BMI (Kg/m2)
22
22.5
23
Disease duration (months)
11
16
25
Heart rate (bpm)
108
120
133
Thyroid hormones
Free triiodothyronine (T3L) (pg/mL)
3.6
4.8
6.21
Total thyroxine (T4) (ng/dL)
6.8
9.3
12.1
Thyroid stimulating hormone (TSH) (mU/mL)
0.14
0.060
0.08
Echocardiographic parameters
Left ventricular diastolic diameter (mm)
52
53
56
Left ventricular systolic diameter (mm)
31
32
34
Left ventricular ejection fraction (%)
37
45
48
Shortening fraction (%)
27
29
32
Telediastolic volume (mL)
85
100
105
Telesystolic volume (mL)
33
37
41
Pulmonary pressure (mmHg)
35
43
56
Left ventricular mass index (g/m2)
47
49
50
Left ventricular mass (g)
77
78
79
Note: normal thyroid hormones levels: T3L 2.50–3.90 pg/mL, T4T 6.09–12.23 ng/dL, and TSH 0.34–5.60 mU/mL, and normal echocardiography parameters: left ventricular diastolic diameter (LVDD) (women 47 mm and men 49 mm), left ventricular ejection fraction (LVEF) (55%), left ventricular end-diastolic volume (LVDV) (women 97 mL and men 102 mL), left ventricular end-systolic volume (LVSD) (women 32 mL and men 34 mL), pulmonary pressure (30 mmHg), and left ventricular mass (women 110 g/m2 and men 134 g/m2).
