Welch Allyn Means ECG Physicians Manual for CP Series Electrocardiographs - User Manual - Manual (Page 46)

MEANS Physicians Manual
Welch Allyn
46
3.9 Group 6: Regular rhythms with P/QRS > 1.0 and PR range

30 ms
Say: “atrial flutter”
if: shortest PP interval < 300 ms
Say:
“atrial tachycardia”
if: 300

shortest PP interval < 370 ms
Say:
“sinus tachycardia”
if: 370

shortest PP interval < 600 ms
Say:
“sinus rhythm”
if: shortest PP interval > 600 ms
Say:
“with second degree AV block at N:1 conduction ratio”
if: atrial rate is an integer multiple N of ventricular rate
Say:
“with advanced AV block at variable conduction ratio”
if: atrial rate is not an integer multiple of ventricular rate