What is the lead sequence of ECG?

The connection sequence of ECG monitoring electrodes is marked with English letters:

Right upper (RA): the first intercostal space of clavicle midline at the right edge of sternum;

Lower right (RL): at the level of xiphoid process of the right clavicle midline;

Middle (c): the fourth intercostal space of the left sternum;

Left superior (LA): the first intercostal space at the left sternal margin of the clavicle midline;

Lower left (LL): The xiphoid process of the left clavicle is horizontal.

Placement position of electrodes of ECG monitor:

The chest guide V 1 ~ V6 is red, yellow, green, tea, black and purple.

V 1 is located in the fourth intercostal space of the right sternum;

V2 is located in the fourth intercostal space of the left sternum;

V3 is located at the midpoint of the connecting line between V2 and V4;

V4 is located at the intersection of the left clavicle midline and the fifth rib;

V5 is located at the level of V4 in the left axillary front;

V6 is located at the level of V4 in the left axillary midline;

Upper limbs are right red and left yellow, lower limbs are right black and left green or right green and left black.

The ECG of the monitoring system is mostly made of silver-silver chloride.

The purpose of heart monitoring is to find arrhythmia and/or bradycardia in time, instead of analyzing S-T segment abnormalities like routine electrocardiogram, or analyzing and explaining electrocardiogram in more detail. Therefore, electrode plate placement is different from routine electrocardiogram examination, and is often called monitoring lead in clinic, but electrode plate placement should meet the following conditions:

1, P wave is clear and obvious (such as sinus rhythm).

2.QRS wave amplitude should be clear and reach a certain amplitude to trigger heart rate counting and alarm.

3, does not interfere with the rescue operation (such as electric defibrillation, etc.). ).

Refer to the above content: Baidu Encyclopedia-ECG Monitoring