ECG Microvoltage

Patient with dyspnea.? QRS complexes are narrow with low amplitude. Maximal amplitude of QRS complex in the limb leads is 2mm and in precordial leads 8mm. Low voltage ECG is confirmed if QRS amplitude in limp leads is less then 5mm and in precordial leads less then 10mm. The most common cause of microvoltage are: Pericardial effusion, COOD, obesity, hypothyroism, restrictive cardiomyopathy. Next significant findings is irregularly irregular rhythm without P wave. This is enough to diagnose atrial fibrillation with ventricular rate ~90/min. Final diagnosis: Microvoltage. Atrial fibrilation with controlled ventricular rate.

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