Implementation of seven echocardiographic parameters of myocardial asynchrony to improve the long-term response rate of cardiac resynchronization therapy (CRT)

Table 2 Baseline patient characteristics (Differences between groups by Whitney-Mann test, Dichotomized data were analyzed by the Chi²-Pearson-Test)

	echo-guided CRT group	controls	p
n =	16	38
% ischemic cardiomyopathy (ICMP)	37.5 (n = 5)	21.1 (n = 8)	0.49
Age [years]	67.1 (± 9.9)	63.6 (± 10.8)	0.79
male %	93.8 (n = 15)	68.4 (n = 26)	0.04
QRS width [mm] at baseline	166 (± 13)	165 (± 18)	0.48
Follow-up-interval [months]	6.7 (± 7.2)	9.4 (± 3.0)	< 0.001
LVEF [%]	23.1 (± 6.7)	24.5 (± 7.4)	0.75
LV-EDV [ml]	259.1 (± 111.2)	262.0 (± 104.8)	0.98
LV-ESV [ml]	199.04 (± 89.4)	204.3 (± 90.8)	0.38
% responder according to reduction of LVESV/increase in EF	13/16 = 81.2%	18/38 = 47.4%	0.04

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