Prophecy ECG
steps for interpreting rhythms 1. Regular/Irregular
2. Rate?
3. P before every QRS and a QRS for every P wave?
4. P-R interval measurement and is it consistent?
5. QRS wide or narrow?
where to put limb leads on 12 lead EKG on wrists and ankles
best lead for atrial rhythms lead II
best lead for ventricular rhythms V1
SA node intrinsic rate 60-100
AV node intrinsic rate40-60
atrial depolarization P wave
PR interval measured BEFORE P WAVE and AT THE Q
norm: 0.12-.20s
***its too long if it is longer than 5 little boxes or one big box
normal PR Interval 0.12-0.20 seconds
ventricular depolarization QRS complex
ventricular repolarization T wave
absolute refractory period The minimum length of time after an action potential during which
another action potential cannot begin
-toilet theory
-problem when QT interval increases
5 large boxes 1 second
15 large boxes 3 seconds
30 large boxes 6 seconds
steps for interpreting rhythms 1. Regular/Irregular
2. Rate?
3. P before every QRS and a QRS for every P wave?
4. P-R interval measurement and is it consistent?
5. QRS wide or narrow?
where to put limb leads on 12 lead EKG on wrists and ankles
best lead for atrial rhythms lead II
best lead for ventricular rhythms V1
SA node intrinsic rate 60-100
AV node intrinsic rate40-60
atrial depolarization P wave
PR interval measured BEFORE P WAVE and AT THE Q
norm: 0.12-.20s
***its too long if it is longer than 5 little boxes or one big box
normal PR Interval 0.12-0.20 seconds
ventricular depolarization QRS complex
ventricular repolarization T wave
absolute refractory period The minimum length of time after an action potential during which
another action potential cannot begin
-toilet theory
-problem when QT interval increases
5 large boxes 1 second
15 large boxes 3 seconds
30 large boxes 6 seconds
