Normal Cardiac Rhythm Parameters

NSR -------------------------------60 and 100 bpm
SB ------------------------------- < 60 bpm
ST ------------------------------- > 100 bpm
QRS -------------------------------0.06–0.10 seconds
PR Interval ------------------------------- 0.12–0.20 seconds
Atrial rate, inherent ------------------------------- 60–100 bpm
Junctional rate, inherent ------------------------------- 40–60 bpm
Ventricular rate, inherent ------------------------------- 20–40 bpm