2 criteria for low voltage:
1) QRS complex in I+II+III <15 mm
- or -
2) QRS complex in V1+2+3 <30 mm
Low voltage is either a 'weak battery' or there is something dampening the current reaching your leads.
Intrinsic low voltage:
- Infiltrative disease
- End stage cardiomyopathy
- Severe hypothyroidism
- Pericardial effusion
- Pleural effusion
If the low voltage is new, consider new onset severe hypothyroidism, pericardial or pleural effusions.
Our thanks to Dr. Tim Davie for assembling the Copa Cardiogram each week. Please follow this link to get to spreadsheet of all Copa Cardiograms.
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