Microvoltations: Difference between revisions

Revision as of 15:38, 20 May 2007

microvoltations: The QRS amplitute (i.e. the sum of the postive and negative parts) in the limb leads does not exceed 0.5 mV (5 mm) OR is no more than 1.0 mV (1 cm) in the chest leads.

Possibe causes of microvoltations:

Cardiomyopathy, especially infiltrative cardiomyopathy, such as in amyloidosis
Increased resistance between the heart and the electrodes: pneumothorax, obesesity, pericardial fluid / tamponade, pleural effusion
Myocarditis / pericarditis
Heart tranplantation, especially during acute or chronic rejection
Wrong settings on the ECG apparatus (sensitivity should be at 10 mm/mV)

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	~~===Microvoltations===~~
	;microvoltations: The QRS amplitute (i.e. the sum of the postive and negative parts) in the limb leads does not exceed 0.5 mV (5 mm) OR is no more than 1.0 mV (1 cm) in the chest leads.		;microvoltations: The QRS amplitute (i.e. the sum of the postive and negative parts) in the limb leads does not exceed 0.5 mV (5 mm) OR is no more than 1.0 mV (1 cm) in the chest leads.