yield class indication 产量等级指标
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Rate responsive pacing is given a Class IIa indication in those with documented chronotropic incompetence.
FORBES: Overview of the New HRS/ACCF Pacemaker Guidelines
In AV block , dual chamber pacemakers also get a class I indication.
Single lead VDD pacing in those with intact sinus node function (i.e. a young patient with congenital AV block) gets a class IIa indication.
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