describe ECG
An ECG, or electrocardiogram, is a non-invasive medical test that records the electrical activity of the heart. It is done to evaluate the overall health and functioning of the heart and detect any abnormalities.
During an ECG, electrodes are placed on the chest, arms, and legs of the patient. These electrodes are connected to a machine that records the electrical signals produced by the heart as it beats. The machine then creates a graph called an electrocardiogram, which shows the electrical impulses and rhythms of the heart.
The ECG waveform consists of several components, including P waves, QRS complex, and T waves, each representing different stages of the heartbeat. These components can indicate various cardiac conditions, such as arrhythmias, heart attacks, or abnormal heart rhythms.
ECGs are commonly used in both diagnosing and monitoring heart conditions. They are quick, painless, and provide valuable information to healthcare professionals about the heart's electrical activity. ECGs may be performed as part of routine check-ups, before surgeries, during emergencies, or when symptoms like chest pain, palpitations, or shortness of breath are present.