9 One very important thing that seems like it should be easy but I always have to remember how to do: determine the rate…Find a QRS complex that is closest to a dark vertical line. Then count the number of “big boxes” until the next QRS complex. For each “big box” you pass, select the next number off the mnemonic " " to estimate the rate.Alternatively, you can count the number of big boxes between two QRS complexes and divide 300 by that number.
10 Note the rate is > 100 bpm Sinus TachycardiaNote the rate is > 100 bpm
11 Note it is “irregularly irregular” and there are no definite p waves Atrial FibrillationNote it is “irregularly irregular” and there are no definite p waves
12 Note the “saw-tooth” pattern Atrial flutterNote the “saw-tooth” pattern
13 Reentry Supraventricular Tachycardia This is a regular, narrow complex tachycardia without P waves, usually with a sudden onset and cessation
14 Monomorphic Ventricular Tachycardia With ventricular rhythms, QRS is usually wide. V tach is more organized electrical activity than v fib, but v tach often deteriorates into v fib so both are very bad!