4,200
edits
Normal Tracing: Difference between revisions
m
no edit summary
mNo edit summary |
mNo edit summary |
||
| Line 1: | Line 1: | ||
'''Characteristics of a normal ECG:''' | |||
* [[Rhythm]]: [[Sinus Rhythm]] | |||
* [[Rate]]: 60-100 bpm | |||
* [[Conduction]]: | |||
** [[Conduction#PQ|PQ interval]] 120-200ms | |||
** [[Conduction#QRS|QRS width]] 60-100ms | |||
** [[Conduction#QT|QTc interval]] 390-450ms | |||
* [[Heart axis]]: between -30 and +90 degrees | |||
* [[P wave morphology]]: | |||
** The maximal height of the P wave is 2.5 mm in leads II and / or III | |||
** The p wave is positive in II and AVF, and bifasic in V1 | |||
** The p wave duration is usually shorter than 0.12 seconds | |||
* [[QRS morphology]]: | |||
**No [[Q waves|pathological Q waves]] | |||
**No left or right ventricular [[hypertrophy]] | |||
**No [[microvoltations]] | |||
**Normal R wave propagation. (R waves increase in amplitude from V1-V5) | |||
* [[ST morphology]] | |||
**No [[ST morphology|ST elevation or depression]] | |||
**T waves should be [[ST morphology|concordant with the QRS complex]] | |||