Arriagada et al identified factors associated with recurrent atrial fibrillation (AF) in a patient with lone atrial fibrillation. The authors are from the University of Barcelona and Institut D'Investigacions Biomediques Pi I Synyer (IDIBAPS).


Lone atrial fibrillation is defined as:

(1) absence of structural heart disease

(2) absence of any other causal factor to explain the AF


Parameters used to predict the risk of AF recurrence:

(1) history of previous episodes of AF

(2) anteroposterior left atrial diameter in mm corrected for body surface area in square meters


anteroposterior left atrial diameter corrected for BSA =

= (diameter in mm by echocardiography) / (BSA in square meters)


The risk of AF recurrence increases with the increase in left atrial diameter.

Past History of AF

LA Diameter (corrected for BSA)

Mean Risk of AF Recurrence at 6 months

no (new onset)

<= 23 mm per square m


no (new onset)

> 23 mm per square m


yes (recurrent)

<= 23 mm per square m


yes (recurrent)

> 23 mm per square m




• The risks listed in the tables are mean values that may underestimate or overestimate the risk at the extremes. For example, a patient with new onset and an LA diameter corrected for BSA < 18.1 mm per square meter had a risk of < 20%.


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