Cardiograms
Cardiograms are graphical records of the heart's activity, produced by noninvasive monitoring techniques. The most widely used form is the electrocardiogram (ECG or EKG), which records the heart's electrical impulses as they propagate through the atria and ventricles.
An ECG is typically obtained with electrodes placed on the arms, legs, and chest, and often displayed
ECG tracings show waves and intervals that reflect events in the cardiac cycle. The P wave indicates
Cardiograms are used to diagnose or assess arrhythmias, conduction disorders, myocardial infarction or ischemia, electrolyte disturbances,
While highly informative, cardiograms primarily reflect electrical activity and do not directly measure heart muscle pumping