Systolic Function: Difference between revisions

Revision as of 04:27, 18 November 2013

Each echocardiogram is an evaluation of the LV dimensions, wall thicknesses and function.

There has to be conducted several (read: different) measurements to be a good estimate of LV function.

	Women				Men
	Reference range	Mildly abnormal	Moderately abnormal	Severely abnormal	Reference range	Mildly abnormal	Moderately abnormal	Severely abnormal
Linear method
Wallmotion score index	1.0	1.0-1.5	1.5-2.0	<2.0	1.0	1.0-1.5	1.5-2.0	<2.0
Endocardial fractional shortening, %	27-45	22-26	17-21	≤16	25-43	20-24	15-19	≤14
Midwall fractional shortening, %	15-23	13-14	11-12	≤10	14-22	12-13	10-11	≤10
2D Method
Ejection fraction, %	≥55	45–54	30–44	<30	≥55	45–54	30–44	<30
Doppler Method
Myocard performance index	<0.40				<0.40
dP/dt	>1100			<500	>1100			<500
Bold values: Recommended and best validated.[1] Click here for ejection fraction determination by Teichholz 'formula Click here for calculating dP/dt Click here for calculation myocardial performance index Click here to calculate fractional shortening.

Comparison of segmental Values (mean and SD) for LV strain (TQ<3), with a repeated measures design.[2]
	All Levels	Apical	Mid	Basal	pValue (Levels)
All Walls	-18.6±5.1	-20.2±5.6	-18.7±3.3	-17.0±5.2	<0.0001
Anterior	-19.5±4.2	-19.4±5.4	-18.8±3.4	-20.1±4.0	0.001
Anteroseptal	-18.8±4.2	-18.8±5.9	-19.4±3.2	-18.3±3.5	0.001
Inferior	-20.0±4.5*	-22.5±4.5	-20.4±3.5	-17.1±3.9	<0.0001
Lateral	-18.3±4.7	-19.2±5.4	-18.1±3.5	-17.3±5.0	0.06
Posterior	-16.3±6.3†	-17.7±6.0	-16.8±5.0	-14.5±7.4	<0.0001
Septal	-18.3±5.3	-22.3±4.8	-18.7±3.0	-13.7±4.0	<0.0001
p (walls)	<0.0001	<0.0001	<0.0001	<0.0001
*inferior was significantly different from other walls (p<0.001 except anterior p+0.002), in the comparison of walls at all levels.†Posterior was significantly different from all other walls (p<0.0001). In the comparison oflevels in all walls, each level was significantly different (p <0.0001). LV=left ventricular, TQ=tracking quality.

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All Medline abstracts: PubMed | HubMed

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	==The Left ~~Ventricular~~==		==The Left Ventricle==

	Each echocardiogram is an evaluation of the LV dimensions, wall thicknesses and function.		Each echocardiogram is an evaluation of the LV dimensions, wall thicknesses and function.