Complete the following ECG criteria for a sinus arrhythmia:
Rhythm ________________________________________
Rate ________________________________________
P waves ________________________________________
PR interval ________________________________________
QRS duration ________________________________________
Fill in the blanks with correct word
Rhythm Irregular, phasic with breathing; heart rate increases gradually during inspiration (R-R intervals shorten) and decreases with expiration (R-R intervals lengthen).
Rate Usually 60-100 beats/min, but may be slower or faster.
P waves Positive (upright) in lead II, one precedes each QRS complex, P waves look alike.
PR interval 0.12 to 0.20 seconds and constant from beat to beat.
QRS duration 0.11 seconds or less unless abnormally conducted.
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