Low voltage generally refers to low limb conductance voltage, a descriptor of the ECG, which may be a normal physiologic condition that does not affect the body. It may also be an abnormal function of the body, which may have an effect on diseases such as emphysema, myocardial infarction, pericardial effusion, and heart failure.
1. Physiological conditions: low voltage in limb conduction may be caused by high vagal tone or lowered sympathetic excitability. Generally speaking, excessive obesity or dry skin may affect the current conduction of electrocardiogram machine, resulting in low voltage in limb conduction; if there is no other disease, this phenomenon belongs to the normal physiological conditions and will not have any effect on the body.
2. Abnormal body function: patients with emphysema may experience low voltage due to excessive gas in the lungs, which affects electrical conduction. Patients with myocardial infarction, pericardial effusion, or heart failure may also have a marked reduction in cardiac electrical activity, which is not effectively transmitted and is manifested as low voltage in limb conduction.
If limb conduction low voltage occurs, it is recommended that the patient seek medical attention to clarify the cause of the disease in order to avoid delaying the condition.