An EKG test is used to check the electrical activity of a patient's heart. These are often done in order to monitor how medication is working for a patient, to check the rhythm of the heart and, in some cases, to check i... More »

Causes for abnormal electrocardiogram results include damage to the heart muscle, a congenital heart defect, swelling or fluid in the sac around the heart, and inflammation of the heart, explains MedlinePlus. Other poten... More »

A normal electrocardiogram result shows a regular rhythm of 60 to 100 wave sets per minute, claims WebMD. An EKG strip displays wave sets for each heartbeat where within each heartbeat the spikes and dips are labeled P t... More »

An EKG is interpreted by systematically analyzing the waves, intervals and segments of the heart’s electrical activity and determining if there are any abnormalities in the tracing, according to Queen’s University School... More »

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To read an EKG practice test strip, begin by counting the number of QRS-complexes in a six-second interval and multiplying that number by 10 to determine the heart rate. Each large square on the EKG paper represents 0.20... More »

Different heart conditions and problems can cause abnormal EKG readings, including congenital heart defects, an enlarged heart, poor blood supply flowing to the heart and arrhythmia, according to MedlinePlus. An EKG, or ... More »

An echocardiogram is a test that looks at the heart's activity through ultrasound waves, according to WebMD. It is used when doctors need to diagnose heart conditions such as heart disease or monitor a heart condition. More »