What is an EKG and what does it catch?

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An EKG - electrocardiogram - records your heart's electrical activity through ten electrode stickers on your chest, arms, and legs: ten seconds of painless recording that maps the rhythm, rate, and electrical health of the heart. NHLBI lists it among the standard heart tests, and what it catches: arrhythmias - atrial fibrillation, dangerous fast rhythms, heart blocks; heart attacks - both happening-now and old silent ones, which leave electrical scars; and strain patterns - hints of thickened heart muscle, electrolyte problems, and sometimes insufficient blood flow.

The honest limits: a resting ten-second EKG is a snapshot. Palpitations that come and go will usually be absent during the recording - that is what Holter monitors and event recorders exist for. And a normal EKG does not rule out coronary disease: arteries can be substantially narrowed with a completely normal tracing at rest, which is why chest-pain stories get stress tests and imaging on top.

Where you will meet one: emergency rooms for chest pain - first test, within minutes; pre-surgery clearances; palpitations and fainting workups; and routine checks when starting heart-active medications. It is worth asking for the tracing interpretation rather than just normal or abnormal - specific findings like AFib have specific follow-ups, and your report belongs in your records.

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What is an EKG and what does it catch?

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