murmur
Medical term EKG and Cardiovascular Testing
An unusual heart sound heard with a stethoscope, often from a valve or septal defect.
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Related terms
- stethoscopeAn instrument that amplifies body sounds such as the heartbeat, lungs and bowel.
- Holter monitorA portable EKG recorder worn during normal activity, usually for 24 to 48 hours (Merck: 24 hours to 14 days).
- 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.
- normal sinus rhythmThe normal heart rhythm, started by the sinus (SA) node at a normal rate.
- P waveThe first wave of the EKG cycle, showing atrial depolarization.
- PR intervalThe EKG measurement from the start of the P wave to the start of the QRS complex.
- precordial leadsThe six chest leads, V1 to V6, that view the heart in the horizontal plane.