Table 3.

Definitions of left atrial normal and low voltages used in other studies.

Rolf et al. [9]	•Normal 0.5 mV, SR
	•0.2–0.5 mV “diseased”
	•<0.2 mV likely to be a scar
Kottkamp et al. [10]	•Normal >1.5 mV, SR
	•0.5–1.5 mV “diseased”
	•<0.5 mV likely to be a scar
Yang et al. [12]	•Normal >1.3 mV, SR
	•0.4–1.3 mV “transitional”
	•0.1–0.4 mV likely to be a scar
Jadidi et al. [11]	•Mapping during AF
	•<0.5 mV “diseased”
	•Fragmented electrograms (70% cycle length)

Voltage: peak-to-peak amplitude of the bipolar electrograms.

Abbreviations: AF, atrial fibrillation; SR, sinus rhythm.