Ability of ambulatory ECG-based T-wave alternans to modify risk assessment of cardiac events: a systematic review

Table 1 Characteristics of prospective cohort studies of AECG-based TWA

Study	Total (n)	Mean age (yrs)	Men (%)	ICD implanted (%)	Population	Mean LVEF (%)	Average follow-up (months)
Sakaki et al. 2009 [19]	295	66	72	7	LVEF < 40%, dilated left ventricle	34	13
Sulimov et al. 2012 [20]	111	64	76	-	Post-MI	46.6	12
Yu et al. 2012 [21]	219	56	81	0	Acute MI	>35%^*	16
Monasterio et al. 2012 [22]	650	63	71	-	symptomatic CHF corresponding to NYHA classes II and III	<35%^†	48
Hoshida et al. 2013 [18]	313	70	74	1	Post-MI	47	39

Abbreviations: AECG ambulatory electrocardiogram, CHF chronic heart failure, LVEF left ventricular ejection fraction, MI myocardial infarction, NYHA New York Heart Association, - not stated. ^*Ninety-two percent patients had LVEF greater than 35%. ^†Fifty-five percent patients had LVEF smaller than 35%.

ISSN: 1471-2261