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Considerations Before Electrocardiogram ECG Test


Considerations Before Going for Electrocardiogram, ECG Test


1. Female examiners avoid wearing dresses

2. Avoid the influence of drugs 
Some drugs directly or indirectly affect the results of electrocardiogram, such as digitalis, quinisil, etc. 
This is because drugs affect the metabolism of the myocardium, people taking such drugs affect the ECG graphics.
Therefore, you should explain to the doctor which medicines you have taken recently to avoid misdiagnosis.

During ECG inspection:

1. Please relax as much as possible during the inspection to ensure the quality of the inspection.

2. Perform when the test is quiet. Bioelectricity is generated due to muscle activity. Crying, taking deep breaths and moving the limbs will affect the ECG results. 
Thus, it should be done when the child or person is quiet. 
If necessary, give the sick child some sedatives to prevent interference caused by other muscle activities.

Interpretation of ECG ( Electrocardiogram ) indicators

Normal value:

    1. Normal ECG ( Electrocardiogram )


    P wave: voltage <0.25mV, time <0.11s, inverted in lead aVR, leads , , aVF, V4V6 stand upright
    P-R interval: 0.12 ~ 0.20s.
    QRS interval: 0.06 - 0.10s.
    QRS wave shape and voltage: aVR main wave is downward, R wave <0.5mV.
    Chest lead: R wave gradually increases from V1 to V6.
S wave gradually decreases from V1 to V6; R / Sv1 <1, R / Sv6> 1. Rv1 <1.0mV, Rv5 <2.5mV.
    There is no abnormal Q wave in each lead (Q wave time> 0.04s, Q wave voltage> 1 / 4R voltage), but lead aVR can be QS or Qr type, and lead V1 can be QS type.
    ST segment: the downward deviation of each lead should be <0.05mV. 
The upward deviation should be <0.1mV, but the V1V3 lead can reach 0.3mV.
    T wave: The T wave should be inverted in the aVR lead. Leads , and V4V6 are more upright, and other leads can be upright, bidirectional or inverted.
    Q-Tc interval: should not be> 0.44s.
    Electric axis: Normal ECG axis -30 ~ + 110 °. 
Left axis deviation: -30 ° ~ -90 °, right axis deviation:> + 110 °.
    P-P or R-R interval> 0.60s, <1.0s.

2. Above Normal ECG ( Electrocardiogram )



No relevant information

3. Below normal value

No relevant information

ECG (Electrocardiogram) related diseases


  •     Coronary heart disease
  •     Heart failure
  •     Arterial embolism
  •     Ventricular tachycardia
  •     Atrial tachycardia
  •     Thrombocytosis
  •     Pericarditis
  •     Heart tumor
  •     Tricuspid malformation
  •     Abortion syndrome
  •     Heart disease
  •     Chest pain
  •     Adult chronic myelogenous leukemia
  •     White blood
  •     Pregnancy with leukemia
  •     Eosinophilic leukemia
  •     Ruptured abdominal aortic aneurysm
  •     Coronary aneurysm
  •     Metastatic malignant melanoma of the heart
  •     Great cerebral venous aneurysm
  •     Thrombocytopenic purpura after blood transfusion
  •     Apical hypertrophic cardiomyopathy
  •     Arrhythmogenic right ventricular cardiomyopathy
  •     Acromegaly cardiomyopathy
  •     Gouty cardiomyopathy
  •     Hypoparathyroid cardiomyopathy
  •     Hypertensive cardiomyopathy
  •     Myocardial infarction
  •     Anti-activated protein C
  •     Allergic cough
  •     Transient ischemic attack
  •     Trigeminal neuralgia
  •     Pituitary tumor
  •     Vertigo
  •     Hepatic encephalopathy
  •     Ptosis
  •     Adenoid hypertrophy
  •     Pharyngitis
  •     Hypothyroidism

Test Results Infographic Chart for Electrocardiogram ECG Inspection

ECG related symptoms


  •     Heartbeat
  •     Lung hyperinflation
  •     Vitamin B1 deficiency
  •     Asymmetric blood pressure and pulse
  •     Increased lung blood
  •     Abdominal Abnormal Breath
  •     Periodic sleepiness
  •     Thoracic outlet syndrome
  •     Pathological Q wave
  •     Incomplete intra-atrial block
  •     Third heart sound
  •     Nostrils leaning forward or nostrils
  •     Arterial oxygen saturation
  •     Heavy chest
  •     Daimai
  •     Forced standing
  •     Left abdominal flexion
  •     Systolic reflux murmur
  •     Continuous machine-like noise
  •     Does not deflect to one side, no vertigo
  •     Left chest pain
  •     Myocardium is gray and relaxed
  •     Chest tightness
  •     Young female with palpitations and chest tightness
  •     Sensitive to sound
  •     Childhood tics
  •     Child phobia
  •     Squeeze colic
  •     Hemoptysis

Electrocardiogram (ECG) Function

The purpose is to draw various patterns of potential changes from the body surface by electrocardiograph to judge the heart condition of the patient. 

Electrocardiogram is an objective indicator of the occurrence, spread and recovery process of cardiac excitement. 

Electrocardiogram is the earliest, most commonly used and basic diagnostic method in the diagnosis of coronary heart disease.
ECG examination process

1. Sleep peacefully, relax your muscles, breathe steadily, keep quiet, do not talk or move your position.

2. Remove the tops (women including bras). Scrub the skin clean, usually use 75% alcohol to wipe the skin where the electrode is placed. 
Apply conductive liquid to keep the skin in good contact with the electrode and conductive performance, corresponding to the chest. Attach the electrode to the location.

3. Wipe away the conductive liquid with toilet paper after inspection.


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