Electrocardiogram

An electrocardiogram (ECG) is a diagnostic test that records the heart's electrical activity in the form of a graph. It is one of the primary tools in cardiology for assessing cardiac function and detecting heart conditions, providing immediate and accurate data.

The waveform of the ECG consists of various waves (P, QRS, T) representing different stages of the cardiac cycle. Physicians analyze these waves to identify abnormalities such as arrhythmias, ischemia, hypertrophy of the cardiac chambers, and other cardiac issues like cardiomyopathies, myocarditis, and pericarditis.

Additionally, it is used to evaluate the effectiveness of pharmaceutical treatments and other therapies.