Welch Allyn Cardioperfect Workstation, PEDMEANS ECG Interpretation Module - Physicians - User Manual - Manual (Page 41)

CardioPerfect Workstation
PEDMEANS ECG Interpretation Module Physicians Manual
DIR 80015051 Rev. C 41 / 55
3.15 Group 12: Irregular rhythms with 0.9 < P/QRS

1.2 and PR range > 30 ms
The presence of a second degree AV block of the Wenckebach type is considered by performing the
Wenckebach test as described in the previous paragraph. If it fails, a test is performed on the PR
range in the RR intervals of about equal length. If this range is large, sinus rhythm with block or
interference in the AV junction is considered. If not, the rhythm is considered to consist of sinus rhythm
complicated by ectopic supraventricular impulses. To distinguish between escapes and premature
supraventricular complexes, a test is performed on the sequence of short and long RR intervals.
Say: “sinus rhythm with second degree AV block, type I (Wenckebach)”
if: test Wenckebach passed
Say:
“sinus rhythm with block and/or interference in the AV junction”
if: PR range

120 ms
Say:
“sinus bradycardia”
if: heart rate < LLN – 10 BPM
Say:
“sinus rhythm”
if: LLN – 10 BPM 
heart rate < ULN
Say:
“sinus tachycardia”
if: heart rate

ULN
Say:
“supraventricular escapes, cause? eg SA block or AV block?”
if: test escape passed
Say:
“premature supraventricular complexes”
if: test escape failed