Sensitive Low Voltage ECG Definition
QRS amplitudes in leads I+II+III < 15 mm OR QRS amplitudes in leads V1+V2+V3 < 30 mm
Specific Low Voltage ECG Definition
QRS amplitudes in limb leads all < 5 mm OR QRS amplitude in all precordial leads < 10 mm
Conduction Interference
Air (COPD, PTX, etc.)
Fat (Obesity)
Fluid/Effusion (pericardial or pleural)
Low Power States
End stage cardiomyopathy
Myxedema (severe hypothyroidism)
Infiltrative diseases (Amyloid, Sarcoid, etc.)