Electrophysiological changes preceding the onset of atrial fibrillation after coronary bypass grafting surgery.

As expected for the lack of time effect in the Non-AF group, there was significant (or close to significance for AAMean ) group*time interactions when either the two hours or the last hour before AF were considered.

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However, cluster analysis ( Figure 6 B ) revealed that this accelerating trend was only present in a subgroup of AF patients, the others having either a decreasing trend or constant heart rate.

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In both raw data and position data, we found an increasing trend of mean LFPortion in the last 30 minutes, reaching a peak in the last 10 minutes before AF.

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