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bradycardia造句
31. Bradycardia, if persistent, should be controlled by the insertion of a pacemaker as soon as possible. 32. SA node dysfunction or atrial-ventricular (AV) conduction block causes improper heart rate ( bradycardia ). 33. Conclusion Functional sinus bradycardia may lead to syncope, dual chamber cardiac pacemaker implantation is an effective prevention method.