, or Join a paid plan. Join Restore

Second Degree Heart Block Type II ECG Interpretation with Sample Strip

ECG Strip

ecg rhythm strip for reference guide

Second Degree Heart Block Type II Rhythm Strip Features

Rate: Characterized by Atrial rate usually faster than ventricular rate (usually slow)
Rhythm: Regular (atrial) and irregular (ventricular)
P Wave: Normal form, but more P waves than QRS complexes
PR Interval: Normal or prolonged
QRS: Normal or wide
A constant P-R interval with missing QRS complexes. Occurring in a specific pattern in a ratio with the P waves.
Second degree Heart Block Mobitz II is characterized by intermittently non-conducted P waves which are not preceded by PR prolongation and are not followed by PR shortening. Mobitz II is usually caused by conduction failure/delay of the His-Purkinje system. In three out of four cases, this conduction block is located distal to the Bundle of His, creating wide QRS complexes. In the other 25% of cases, the block is located within the Bundle of His, producing narrower QRS complexes.
External Source: http://
Texas Heart Institute

Authors and Sources

Authors and Reviewers


? v:2 | onAr:0 | onPs:2 | tLb:0 | pv:1
uStat: False | db:0 | cc: | tar: False
| cDbLookup # 0 | pu: False | pl: System.Collections.Generic.List`1[System.String]

An error has occurred. This application may no longer respond until reloaded. Reload 🗙