
14. Electrocardiogram (ECG or EKG)
Electrocardiograms, or EKGs, changed the medical sphere by providing necessary information about the heart and how it operates. Studying the heart was once limited to listening to it through a stethoscope because of how delicate the heart actually is; there was no way to examine it more carefully without causing a patient a lot of pain. However, EKGs changed this for the better. Researchers invented it back in 1909, and they developed it with the study of arrhythmias in mind. It is a completely painless, non-invasive procedure that studies the heart’s electrical signals to see if it is functioning properly.
Nowadays, doctors use them to study more than just arrhythmias. These medical devices can see if there are blocked or narrowed arteries or if you’re at risk for a heart attack. They detect certain conditions affecting the heart that could require the installation of a pacemaker. Experts don’t recommend EKGs for those at low risk or who don’t have any symptoms. However, if symptoms are infrequent, you can use personal EKGs called Holter monitors to record the signals so that doctors can diagnose what the problems might be.