Left ventricular contractile reserve by stress echocardiography as a predictor of response to cardiac resynchronization therapy in heart failure: a systematic review and meta-analysis

Table 2 Rest and stress echocardiographic characteristics of the studies included in the analysis

	LVEDV at rest (ml)	LVESV at rest (ml)	LVEF at rest (%)	Type stressors	Dose (mcg)	LV Contractile reserve criteria
Da Costa A [8]	249 ± 92	187 ± 75	26 ± 5	dobutamine	10	EF increase >1.25-fold
Rocchi G [9]	183 ± 54	139 ± 45	24 ± 5	exercise	-	WMSI decrease >0.25
Ciampi Q [10]	176 ± 64	129 ± 52	27 ± 6	dobutamine	40	WMSI decrease >0.20
Lancellotti P [11]	184 ± 39	134 ± 32	27 ± 5	exercise	-	EF increase >6.5%
Senechal M [12]	216 ± 65	180 ± 62	19 ± 7	dobutamine	20	WMSI decrease >0.25
Chaundry FA [13]	108 ± 32	87 ± 23	18 ± 7	dobutamine	20	WMSI decrease >0.31
Altman RK [14]	-	116 ± 40	28 ± 6	dobutamine	10	EF increase >20%
Gasparini M [15]	215 ± 79	159 ± 65	27 ± 6	dobutamine	20	EF increase >5 points
Pugliese M [16]	-	-	27 ± 4	dobutamine	20	WMSI decrease >0.20
Mizia-Stec K [17]	-	-	24 ± 6	dobutamine	20	WMSI decrease >0.20
Murin P [18]	227 ± 66	168 ± 55	26 ± 7	dobutamine	40	EF increase >7%
Mean Value	195 ± 61	144 ± 49	25 ± 6		22

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