Welch Allyn Means ECG Physicians Manual for CP Series Electrocardiographs - User Manual - Manual (Page 51)

MEANS Physicians Manual
Welch Allyn
51
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 < 50 BPM
Say:
“sinus rhythm”
if: 50  heart rate < 100 BPM
Say:
“sinus tachycardia”
if: heart rate

100 BPM
Say:
“supraventricular escapes, cause? eg SA block or AV block?”
if: test escape passed
Say:
“premature supraventricular complexes”
if: test escape failed
3.16 Group 13: Irregular rhythms with P/QRS > 1.2 and PR range > 30 ms
Say: “supraventricular (sinus?) tachycardia with second degree AV block at variable
conduction ratio ”
if: 300  shortest PP interval < 600 ms
Say:
“sinus rhythm with second degree AV block at variable conduction ratio”
if: shortest PP interval

600 ms