Holter monitor

Medical term EKG and Cardiovascular Testing

A portable EKG recorder worn during normal activity, usually for 24 to 48 hours (Merck: 24 hours to 14 days).

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Related terms

dysrhythmiaAn abnormal heart rhythm; also called arrhythmia.
electrocardiogramA tracing of the heart's electrical activity recorded from electrodes on the skin.
electrodeA sensor placed on the skin that picks up the heart's electrical signals for the EKG.
heart blockAn interruption in the heart's normal electrical conduction pathway, such as an AV block.
isoelectric lineThe flat baseline on an EKG when no electrical activity is recorded.
leadA view of the heart's electrical activity, recorded as the voltage difference between electrodes; the word…
limb leadsThe six frontal-plane views of a 12-lead EKG: leads I, II and III and the augmented leads aVR, aVL and aVF.
murmurAn unusual heart sound heard with a stethoscope, often from a valve or septal defect.