What Is A Premature Ventricular Contraction (pvc) On A Stress Test?
Premature ventricular contractions (PVCs) are early or extra heartbeats that commonly occur and are usually harmless in normal hearts, but can cause problems in hearts with pre-existing disease.
Abnormally fast heart rates are classified into two types: supraventricular (meaning "above the ventricle") tachycardias, those that arise in the atria (plural of atrium) or the atrioventricular node, and ventricular tachycardias.
In both instances, an extra or early beat may trigger the rapid rhythms....
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