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Results from one of the largest global studies of atrial fibrillation (AFib) procedures show that the simple approach is usually best when it comes to ablation, a procedure where physicians destroy or ablate cardiac tissue to correct irregular heart rhythms. Researchers found that using advanced image-guided technology to more aggressively target diseased areas of the heart that cause arrythmias didn’t lead to better outcomes for patients — and put some at higher risk of strokes, according to new results.