Welch Allyn Means ECG Physicians Manual for CP Series Electrocardiographs - User Manual - Manual (Page 54)

MEANS Physicians Manual
Welch Allyn
54
Say: “sinus bradycardia”
if: 40

heart rate < 50 BPM
and rate variation

20%
Say:
“sinus rhythm (slow)”
if: 50

heart rate < 60 BPM
and rate variation

20%
Say:
“sinus rhythm”
if: 60

heart rate < 90 BPM
and rate variation  20%
Say:
“sinus rhythm (rapid)”
if: 90

heart rate < 100 BPM
and rate variation  20%
Say:
“sinus tachycardia”
if: heart rate  100 BPM
and rate variation

20%
Say:
“short PR interval”
if: PR interval < 120 ms
and heart rate < 140 BPM
Say:
“first degree AV block (limited)”
or
“first degree AV block”
or
“first degree AV block (extensive) ”
if: the appropriate limit from Table 4 is met
Table 4. PR intervals limits (in ms) for first degree AV block at different
levels of severity. Limits are heart-rate dependent.
severity heart rate

70 71-90 91-110 111-130 > 130
limited 220 210 200 190 180
typical 260 248 235 222 210
extensive 300 285 270 255 240