Electrocardiogram as a routine examination item, we can effectively detect the heart recessive disease by identifying electrocardiogram, provide effective basis for the diagnosis and treatment of cardiovascular diseases, and can play an auxiliary diagnostic value in other medical fields.
Beginner electrocardiogram
The actual ECG drawing is composed of 1mm*1mm small squares
The horizontal coordinate represents the time, each large cell is divided into 5 small cells each 1 small cell =0.04s, each large cell =0.2s
The ordinate represents the voltage, and each large cell is divided into 5 small cells. Each small cell =0.1mV, and each large cell =0.5mV
P wave: represents the atrial depolarization process. The first half of the P wave is the right atrium, and the second half is the left atrium, so the abnormal P wave reflects the problem of the atrium
QRS wave: represents the ventricular depolarization process. Large, malformed QRS waves reflect ventricular problems
ST-T segment: represents the whole process of ventricular repolarization. The abnormalities are more common in ventricular problems, but lack specificity
Q-T interval: represents the entire ventricular activity process. Mainly look at the corrected Q-T period
Heart rate calculation
Heart rate =60/P-P (or R-R) Normal heart rate is known to be 60-100 beats/min so normal heart rate interval is 3-5 large bars (15-25 small bars)
Common ECG recording paper specifications and sizes
50mm x 20m, 50mm x 30m, 210mm x 30m
The main specifications of the 12-guide ECG recording paper ：
210mm*30m,183*30m,215mm*30m,216mm*30m,210mm*150mm-20P,210mm*295mm-200P,210mm*300mm-200P,210mm*140mm-20m,215mm*280mm-200P ,210mm*280mm-200P,145mm*100mm-200P,144mm*125mm-200P,183mm*130mm-200P,183mm*260mm-200P,216mm*140mm-200P
Ecg recording papers are made of pure wood pulp base paper, so that the ECG drawings can evenly absorb ink, the paper texture is tight, the quality is stable, the coating of multiple layers, so that the printing is more clear, our logistics adopts double packaging, paper box plus film, waterproof, moisture-proof and scratchproof, the use of more assured, safer transportation.
When placing ECG recording papers it is necessary to avoid high temperature environment, avoid direct sunlight, avoid long-term placement under fluorescent lamps, and should be placed below 70 ° C, such as long-term placement at temperatures above 70 ° C, it may lead to changes in product color, affecting actual use.
