Læknablaðið - 15.08.1994, Page 27

LÆKNABLAÐIÐ 1994; 80
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Table I. Comparison between left ventricular volumes (ml), and ejection fraction (%).
End-diastolic volume End-systolic volume Stroke volume Ejection fraction
Angiography: Echocardiography: New method Cube Teichholz Ellipse Bullet Thermodilution: 175 ± 58 (60-276) 175 ± 37 (104-263) 213 ± 85 (91-422)" 175 ± 52 (91-295) 166 ± 55 (76-307) 208 ± 69 (95-384)" 79 ± 50 (11-181) 77 ± 43 (20-160) 72 ± 57 (9-238) 73 ± 45 (15-194) 68 ± 43 (14-180)* * 86 ± 54 (18-225) 95 ± 27 (48-158) 98 ± 19 (51-130) 141 ± 42 (82-256)*” 103 ± 22 (64-147)* 98 ± 23 (62-158) 122 ± 28 (77-197)*** 83 ± 15 (43-120)** 58 ± 17 (21-82) 58 ± 16 (24-81) 70 ± 14 (39-90)*** 61 ± 15 (31-84)* 62 ± 13 (32-82)** 62 ± 13 (32-82)**
Data are mean ± 1 SD (range). Number of patients = 32. Comparison with angiography:* p<0.05, **p<0.01, ***p<0.001.
Table II. Correlations for left ventricular volumes by various methods.
Correlation equation SEE r-value
End-diastoiic volumes (ml):
Angio (Y) vs Echo (X): New method Y = 1.31X - 55.7 33.1 0.83
Cube Y = 0.48X + 73.0 42.0 0.70
Teichholz Y = 0.79X + 35.8 41.3 0.71
Ellipse Y = 0.83X + 36.4 36.5 0.79
Bullet Y = 0.66X + 36.6 36.6 0.78
End-systolic volumes (ml):
Angio (Y) vs Echo (X): New method Y = 1.04X - 0.77 23.4 0.89
Cube Y = 0.69X + 30.0 31.2 0.79
Teichholz Y = 0.88X + 15.3 30.1 0.80
Ellipse Y = 0.99X + 11.6 26.0 0.86
Bullet Y = 0.79X + 11.6 26.0 0.86
Stroke volumes (ml):
Angio (Y) vs Echo (X): New method Y = 1.07X - 10.0 18.1 0.75
Cube Y = 0.30X + 52.8 24.1 0.47
Teichholz Y = 0.79X + 13.8 20.6 0.65
Ellipse Y = 0.76X + 21.1 21.0 0.64
Bullet Y = 0.60X + 21.5 21.1 0.64
Thermo (Y) vs Echo (X): New method Y = 0.46X + 38.5 13.2 0.55
Cube Y = 0.16X + 60.5 14.1 0.45
Teichholz Y = 0.40X + 42.8 12.6 0.60
Ellipse Y = 0.36X + 48.7 13.3 0.54
Bullet Y = 0.28X + 48.8 13.4 0.53
Thermo (Y) vs angio (X): Y = 0.36X + 48.6 12.3 0.62
Number of patients = 32, except 35 for correlations with thermodilution. Angio = angiography. Echo = echocardiography. Thermo = thermodilution.
samdrætti í framvegg (mynd 1). Útkoman var
lökust með teningsaðferðinni (mynd 2). Þegar
henni er beitt með leiðréttingu Teichholz fæst
þó betra samræmi (mynd 3). Þó r-gildið fyrir
byssukúlu-/sporbaugslíkanið sé hærra en fyrir
aðferð Teichholz er samræmi ekki betri þegar
litið er á mynd 4. Aðalskekkjan hjá þremur
síðastnefndu aðferðunum felst í því að ofmeta
útstreymisbrot slegla með framveggsskaða
(myndir 2-4).