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Using a external chest electrode, connected in parallel with distal esophageal electrode, allowed effective atrial capture in more than 80% of patients at pacing pulse current 13 mA or less, while 19 mA was required for 100% capture (Fig.
In 4 patients, the use of the proposed method was not accompanied by increased atrial capture current.
We demonstrated the possibility of utilizing a split stimulus pulse to achieve successful atrial capture.