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Reprinted from alumni of the user at 21:10 on June 15 2010 read (loading. ..) Comments (0) Category: Diagnostics
normal ECG:
1. not scale:
2. a scale (used in the clinic):
representative of each small grid of longitudinal
0.1mV, a small cell on behalf of each lateral 0.04s. (Because the ECG sensitivity and paper speed were 1mV/cm and 25mm / s.)
P wave: 0.25mV)
3, right ventricular hypertrophy: Just look at V1 is greater than 2, the grid is 2 up and down the vertical grid
; (ie, QRS wave in lead V1 R / S> 1, that is, R wave> S wave amplitude)
4, atrial fibrillation: all the P - P, Q - Q, R - R, S - S, T - T no law, that is, the location of P waves on the mess. Can be developed into ventricular fibrillation.
; (ie, the location of P wave f wave is replaced by the small sizes, while the QRS wave normal)
ventricular fibrillation: all the P - P, Q - Q, R - R, S - S, T - T did not rule, normal QRS wave disappeared, leaving only the sizes of the wavelet.
This
extremely dangerous when the patient, ventricular arrest at any time, it is timely defibrillation.
5, sinus bradycardia: P wave normal, and each cardiac cycle, that is,
chi turbo flat iron, between the two P waves, also known as PP interval, are greater than five large cells (25 small cell), / p>
; is about horizontal grid.
; (PP interval> 1.00s, can be calculated heart rate
6, sinus tachycardia: P wave normal, and each cardiac cycle is less than 3 large cell (15 small cell), is around the grid.
; (PP interval 100 times / min)
7, atrial contraction: for some of the normal wave, then a boys and girls, before (note: this wave pqrst shape is normal, just ahead of Bale),
; next wave is normal.
8, ventricular contraction: for some of the normal wave, then a boys and girls, before (note: this time the R wave broadening), next is the normal wave
9, typical of myocardial ischemia: V4, V5,
cheap chi straighteners, V6 ST-segment depression
10, acute myocardial infarction: Q wave arched upward widening + ST segment elevation Note: anterior view V1, V2, V3, V4, V5, V6; under the wall to see Ⅱ, Ⅲ, aVF