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Prolonged QRS and PR intervals in atrial fibrillation predict poor outcome. |
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EurekAlert: Researchers found that the strongest indicators of risk were prolonged QRS duration and prolonged PR and QT intervals, each of which is a measure of electrical waves that regulate heart rhythm. For example, a prolonged QRS duration is associated with an increased risk of multiple adverse cardiovascular outcomes including death and hospitalization. An increased PR interval is associated with cardiovascular death and sudden cardiac death. A prolonged corrected QT interval is associated with an increased risk of cardiovascular hospitalization and sudden arrhythmic death in men.
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