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                                    Case Study: Atrial Fibrillation%u2022 A 68-year-old woman complains of palpitations and shortness of breath. Scenario:%u2022 ECG shows irregular rhythm with no discernible P waves and varying R-R intervals.ECG Findings:%u2022 The irregularly irregular rhythm on ECG is pathognomonic for atrial fibrillation.Clincher:%u2022 Absence of P waves and irregular R-R intervals are hallmark features of atrial fibrillation on ECG.Explanation:
                                
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