orangeber.blogg.se - How to read ecg easy

RR interval variable with no pattern, totally irregular Normal and ectopic beats grouped together and repeating over and over.

Regularly irregular : RR interval variable but with a pattern.

Will shorten during exercise as heart rate increases.

Normal: Should be regular and consistent, especially at rest.

This is duration is used to calculate heart rate.

Represents: The duration between subsequent “heart beats”.

More often the ST-T segment is a smooth, continuous line beginning at the J-point (end of QRS), slowly rising to the peak of the Twave and followed by a rapid descent to the isoelectric baseline.

Normal: A discrete ST segment distinct from the T wave is usually absent.

Represents: The interval between ventricular depolarization and repolarization.In leads aVR and V1 it is normal for the T wave to be negative, however the QRS is also negative Normal: It’s deflection should be the same direction as the QRS complex (ie if the QRS is positive the T wave should be positive).Upper limit 2.5 – 3.0 mV (25 small boxes.>1.0 mV in at least one precordial lead (10 small boxes).

Duration: 0.5 mV in at least one standard lead (5 small boxes).(Include image with each wave or interval highlighted) Tick Marks on ECG paper rhythm strip: 3 secs.5 thick lines boxes (25 small boxes)= 1 second.ECG paper (Figure 1) is helpful in understanding this as it’s organized and scaled to illustrate to those normal intervals. One of the most important components of interpreting an ECG is understanding the normal intervals and what they represent.