Figure 1.

Simplified flow-chart: cs – current sample; CAND – VB candidate; Vmax – max value of CAND; RR_c – current RR interval; RR_c-1 – last but one RR interval; qrs – QRS buffer; ectopic – EB buffer; susp – buffer for subsequent analysis; TPL – normal QRS template; BW – biphasic wave; RE – requirement to BW ectopic beat; RRE – reduced RE.