When the heart beats, an electric current is first generated, causing a potential difference on the surface of the human body. These potential differences are recorded with an electrocardiograph, and the resulting pattern is called an electrocardiogram. ECG is widely used in clinical practice. It can not only record the electrical activity of the normal heart, but also assist in the diagnosis of myocardial ischemia, myocardial infarction and arrhythmia and other heart diseases.

What to do for professional ECG examination

When going to the hospital for a 12-lead electrocardiogram, the doctor usually places 10 electrodes on the examiner, 6 on the left chest wall, and 2 each on the wrist and ankle. The reason for putting so many electrodes is that the heart is a three-dimensional structure with two atria and two ventricles. In order to reflect the electrical activity of different parts of the heart, electrodes need to be placed in different parts of the human body to record and reflect the electrical activity of the entire heart. activity.
Different from the single-lead electrocardiograph with limited diagnostic function on the market, healforce’s 80D is a three-lead, which can be used for rapid initial diagnosis in the hospital.

The difference of the ECG waveform represents the different nature of heart disease

Usually, there are 12 curves in the ECG, representing the conventional 12 leads, namely limb leads I, II, III, avR, avL, avF and the chest leads V1, V2, V3, V4, V5, and V6.

Different leads have problems, which means that there are diseases in different parts of the heart. For example, leads V1 to V4 are related to the front wall of the left ventricle, and leads II, III and avF are related to the lower wall of the left ventricle.

When the heart completes a beat (systole and diastole), each lead will record a complete curve, with crests and troughs. When the heart beats again, there will be a curve that is exactly the same. And the curve of each beat is broken down into P wave, PR interval, QRS complex, ST segment, T wave and other bands, which represent the electrical activity of the atrium or ventricle during a beat. Problems with different bands represent the different nature of heart disease.

HealForce PC80D is equipped with PC-side software, which can download the ECG management software, statistically analyze the ECG waveform of the measurer and generate analysis reports, which can be used for clinical reference.

The role of electrocardiogram in the diagnosis of heart diseases

In the ECG report, the most common word is “sinus rhythm”. According to experts, the normal heartbeat has a certain rhythm, which is determined by the heart’s “sinoatrial node”, which issues instructions to direct the heart to beat 60-100 times per minute, and this is sinus rhythm. Therefore, reporting sinus rhythm means that the heart rhythm is normal.
However, once the sinus node fails to work properly, or other parts of the heart “override” to give orders instead of the sinus node, or the system that transmits commands is blocked, it will cause the heart to beat abnormally and cause the so-called arrhythmia, such as Premature beats, atrial fibrillation, atrioventricular block and so on. Arrhythmia is a large group of diseases that can be detected by electrocardiogram. It can occur alone or with other cardiovascular diseases.

Regular heart tests are really important, but going to the hospital for checkups is cumbersome and time-consuming.


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