A summary of ECG electrocardiography

First, how to look at the heart rateSee R-R or P-P spacing of 3 - 5 part: normal heart rate (60 - 100)Less than 3 of the heart rate too fast


First, how to look at the heart rate

See R-R or P-P spacing of 3 - 5 part: normal heart rate (60 - 100)

Less than 3 of the heart rate too fast

More than 5 of the heart rate is too slow

Two, how to look at the rhythm of the heart

A: P wave: sinus rhythm

No P wave: ectopic rhythm

B: neat (PP or RR difference between less than 0.12s): Law

Irregular rhythm (PP or RR difference is greater than 0.12s): beats (room, room, borderline); escape block (room, room, borderline)

C: Atrial P wave form is not the same

No P wave or backward propagation in the junction

Ventricular QRS wave, greater than 0.12

Block: PR interval, P after the QRS

Paroxysmal supraventricular tachycardia, heart rate: 160 - 250 / min, P wave, p-r>0.12 - no real P wave or retrograde P wave, p-r0.04, or 1/3 > main wave?

If yes, indicate infarction, and distinguish between the new and the old? (see if there is any elevation in the ST segment)

Look at the wall? (before V1-V6, after V1, side 1,, AVL, under 3, AVF), there is a special post wall that is large R wave,

V1, v2:

Early myocardial infarction: High T wave, or ST segment elevation and T wave fusion

Acute: Q wave coronal T wave

Subacute: Q wave coronal T wave shoaling

Old: Q wave or disappear

Localization of myocardial infarction:

The former partitions: V1-V3

Front wall: v3-v5

Sidewall: 1, avlv5-v6

Extensive anterior wall: V1-V6, 1, AVL

Lower wall: 2, 3, AVF

Posterior wall: V7-V9 has V1, V2R wave surge and T wave high)

Six, see m like wave 6, see if there is no m like wave indoor block: V1V2 right v5v6 left

Seven, look at the characteristics of T wave coronal t wave:

Narrow, apex, bilateral symmetry, inversion usually occurs at 1, 2, AVF, V3, V5, when combined with the ST segment down, you can clear myocardial ischemia



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