Practice Rhythm Strips

Practice Rhythm Strip 13
Rate:	About 35 BPM	PR intervals:	Constant
Regularity:	Regular	QRS width:	Narrow
P waves:	Normal	Grouping:	Present
Morphology:	Normal	Dropped Beats:	Present
Axis:	Normal	Rhythm:	2:1 or untypable second-degree AVB
P:QRS ratio:	2:1

This strip shows a strip with 2:1 block and a ventricular rate of 35 BPM. The PR interval is normal and consistent when it conducts. This could be compatible with either Mobitz I or Mobitz II. Based on this strip, the diagnosis can only be 2:1 AV block.

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