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Fragmented QRS (fQRS) Index Calculator
Fragmented QRS (fQRS) Index: Explanation and Clinical Context Fragmented QRS (fQRS) refers to additional R waves (R’) or notching in the nadir of the S wave in contiguous ECG leads, representing myocardial conduction delay due to fibrosis or scarring. The fQRS Index is calculated as the number of ECG leads showing fQRS divided by the total number of leads (usually 12-lead ECG), providing a quantitative measure of myo