What is an ECG Paper?
ECG Paper is the trends of the Electrocardiogram are recorded using electrocardiogram paper which is similar to the graph paper.
What is an Electrocardiogram (ECG)?
Electrocardiogram (ECG) is an essential part of the assessment of cardiac patients. ECG is the instantaneously amplified and a recorded sum of the electrical activity exhibited by cardiac muscles upon contraction as a response to their electrical depolarization.
Manufacturing of Electrocardiogram Paper
The white paper is the basic raw material for it. This paper undergoes processing through the black processing machine which coats the blank ECG paper black using black coating chemicals & In further processing, the paper is coated white using white coating chemicals.
How to Read the Trends on an Electrocardiogram Paper?
Calibration of the Electrocardiogram Paper
In terms of being similar to graph paper, It is scored at a distance of 1mm and for every 5 small boxes, A heavy line indicates a 5mm square.
The amplitude of the heart’s electrical current is measured on the vertical axis. It is measured in millivolts (mV). By standard, 10 mm in height equals 1 mV & Therefore each 1 mm square on the vertical axis equals 0.1 mV and each large square indicates 0.5 mV.
The horizontal axis measures time. On a standard ECG, the paper speed is 25 mm/s & Therefore, the ECG paper dimensions are such that, each 1 mm square on the horizontal axis equals 0.04 s, and each large square signifies 0.20s.
Using the Trends For Diagnostics
The paper speed can be increased (to see wave abnormalities) or decreased (to check for rhythm disorders) & Additionally, the amplitude can also be increased (if low voltage is present) or decreased (when QRS complexes are too large) as per convenience and use.
Use of a standard ECG Paper
Standard ECG paper permits an approximate estimation of the heart rate (HR) from an ECG recording & Calibration is performed automatically at the start of the ECG.
An electrical 1 mV signal is sent for 0.2 s, recording a rectangular shape with a 10 mm height and 5 mm width.
ECG Paper and Ease of Diagnostics
The Electrocardiogram leads on paper allow easy appreciation of heart rates and cardiac intervals and permits a meaningful comparison to be made between ECGs recorded on different occasions or by different Electrocardiogram machines.