Rhythm Interpretation第 17 / 100 题
What is the inherent rate range of the AV junction when it functions as the heart's pacemaker?
a.100 to 150 beats per minute
b.60 to 100 beats per minute
c.40 to 60 beats per minute
d.20 to 40 beats per minute
解析
The AV junction fires at an inherent rate of 40 to 60 beats per minute and takes over when the SA node fails or slows. The SA node is the primary pacemaker at 60 to 100, and the ventricular Purkinje network is the last-resort pacemaker at 20 to 40. A junctional rhythm faster than 60 is called accelerated junctional, and above 100 it is junctional tachycardia.
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