-
Luigi Galvani
He made he discovery that electricity causes muscle contractions. He found this out when he was observing the twitches of a frog's leg using a spark generator. -
Julius Bernstein
He developed a technique that measures electrical signals from muscles. He called it "electromyography." -
Luigi Luciani
They demonstrated cardiac group beating. He named it periodic rhythm. He also recorded 2nd degree AV blocks. -
Augustus D. Waller
Recorded the first human ECG by placing wires on arms and legs of a patient with rheumatic fever. -
Willem Einthoven
He labeled the deflections of PQRS and T waves. -
Einthoven
He provided the first organized presentation on normal and abnormal ECG's recorded on his string galvanometer. He also presented cases of atrial and ventricular hypertrophy, ventricular premature beats, and introduced the U wave. -
EKG Leads
At an address to the Chelsea Clinical Society, Einthoven had outlined his schema for the equilateral triangle formed by his standard leads, l, ll, and lll. It's known as the Einthovens Triangle. -
First Usable ECG Machine
The first commercially available ECG machine was produced by Cambridge Instrument Company in England. -
Claude Schaeffer Beck
He successfully defibrillated a human heart around 137 years after treatment by electric shock in cases of cardiac arrest. -
First Ambulatory ECG
Norman "Jeff" Holter, invented ambulatory electrocardiography. The first ECG radio transmitter with batteries weighed more than 38 kg. It was also the first broadcast of a radioelectrocardiogram (RECG). -
Computerized ECG
Computerized ECG analysis becomes possible, allowing for more accurate and efficient interpretation of ECG data. -
Mobile Units
Electrocardiographic telemetry from ambulances. This was an approach to mobile coronary care units. -
Right Sided Precordial Lead
Erhardt, Sjögren and Wahlberg described the use of a right sided precordial lead in the diagnosis of right ventricular infarction. Which was previously thought to be electrocardiographically silent. "Single right-sided precordial lead in the diagnosis of right ventricular involvement in inferior myocardial infarction." -
Apple Watch ECGs
Over 400,000 who wore Apple smart watches enrolled in a study being conducted by Stanford researchers and Apple. They were trying to determine whether a wearable technology can identify irregular heart rhythms suggestive of atrial fibrillation. -
EKGs Now
EKG technology continues to evolve, with the development of wireless ECG devices and other advanced features that allow for real-time monitoring and analysis of heart function.